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Best Online Slots - Top UK Slot Sites in 2024

By Guy Evans on

TopRatedCasinos.co.uk is dedicated to helping customers find the best place to play online. Your safety and well-being is a priority, which is why all of our expert casino reviews are 100% honest and unbiased, and we highlight the key terms and conditions of every casino bonus we advertise. Whilst we accept commission from the casinos on our list of recommendations, and this may affect where they’re positioned on our lists, we only recommend casinos that we truly believe are safe and fair.

TopRatedCasinos.co.uk is dedicated to helping customers find the best place to play online. Your safety and well-being is a priority, which is why all of our expert casino reviews are 100% honest and unbiased, and we highlight the key terms and conditions of every casino bonus we advertise. Whilst we accept commission from the casinos on our list of recommendations, and this may affect where they’re positioned on our lists, we only recommend casinos that we truly believe are safe and fair.

Creative themes, varied mechanics, and bonus bonanzas — at the best slot sites, there’s no shortage of entertainment at the reels.

Here at TopRatedCasinos we’ve broken down the broad and frankly overflowing world of online slots and where to play them, so that you can cut through the noise and head straight to the action. It’s simple: read through this guide, find your ideal slot site, and start spinning.

Our Best Slots Sites Recommendations - December 2024

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Rank Online Casino Casino Rating Sign-up Bonus Payout speed Key features Sign Up Review Terms & Conditions More information Slots
1

100% up to £50 + 50 Free Spins

Payout Speed
Instant - 5 days
571
  • 'Duel' Against Other Slots Players for Rewards
  • 50 No Wagering Free Spins When You Sign Up
  • Top Quality Slots Collection
Claim Bonus
Robbie Evans headshot
"I really like VoodooDreams' neon design, and the spell casting rewards system's regular bonuses are a real treat."
Robbie Evans
18+ new players only. Maximum £50 bonus. Minimum deposit: £20. Deposit Bonus wins are capped at £500. Max bet with active bonus: £2. Wagering requirement 100% match deposit bonus: 30 times sum of deposit + bonus. Winnings from Free Spins are credited as Real Money without wagering requirement. Some games may not be played with an active bonus. Games may contribute differently when wagering a bonus. Deposit Bonus expires after 30 days if wagering requirement has not been met. Free Spins expire after 3 days. One bonus allowed per person, address, device, IP. www.begambleaware.org For full bonus terms and conditions, please read below. Responsible Gaming 18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.
Payment Methods
  • MasterCard Logo
  • Visa Debit Logo
  • PayPal Logo
  • Trustly Logo in green
  • skrill logo
  • Paysafecard logo
  • Neteller Logo
  • ecopayz logo
Payout Rate
Payout Rate
96.5%
Software providers
  • Betsoft
  • Evolution Gaming
  • Microgaming
  • NetEnt
  • Nolimit City
  • NYX Gaming
  • Play'n GO
  • Push Gaming
Features
  • Casino Casino
  • Bingo Bingo
  • Sport Sport
  • Poker Poker
2

50 Free Spins Upon Deposit No Wagering

Payout Speed
Instant - 6 days
1000
  • No Wagering Free Spins
  • Huge Slots Library
  • Dedicated Jackpot Slots Section
Claim Bonus
James Langley
"MagicRed knocks it out the park when it comes to flexible payment methods, including my favourite e-wallet service: AstroPay."
James Langley
18+. New Players Only. Terms and Conditions Apply. Available only on Big Bass Bonanza game. Min. Deposit £10. Offer valid for 24 hrs. No wagering required. See full terms
18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.
Payment Methods
  • Bank Transfer Logo
  • MasterCard Logo
  • Visa Debit Logo
  • PayPal Logo
  • Trustly Logo in green
  • skrill logo
  • Astropay Logo
  • Paysafecard logo
Payout Rate
Payout Rate
98%
Software providers
  • Hacksaw Gaming
  • Amaya
  • Evolution Gaming
  • iSoftBet
  • Microgaming
  • NetEnt
  • NextGen Gaming
  • Nolimit City
Features
  • Casino Casino
  • Bingo Bingo
  • Sport Sport
  • Poker Poker
3

100% up to £100 + 10% Cashback

Payout Speed
Instant - 5 days
1600
  • Massive Slots Library
  • Filter Through Slots by Provider
  • Lots of High RTP Slots
Claim Bonus
Marcus Lawrence
"All British Casino's lifetime 10% cashback offer is fantastic, and I fully recommend it to players looking for great value."
Marcus Lawrence
#AD New customers only, min deposit £20, wagering 35x, max bet £5 with bonus funds. Max bonus is 100% up to £100. No max cash out on deposit offers. Welcome bonus excluded for players depositing with Skrill or Neteller. Cashback is cash with no restriction. Click here for full T&Cs
18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.
Payment Methods
  • Bank Transfer Logo
  • MasterCard Logo
  • Visa Debit Logo
  • skrill logo
  • Paysafecard logo
  • Neteller Logo
  • boku logo
  • Trustly Logo in green
Payout Rate
Payout Rate
97.5%
Software providers
  • PlayPearls
  • Slingo Originals
  • 1x2 Gaming
  • Amatic
  • Bally
  • Barcrest
  • BetGames.tv
  • Big Time Gaming
Features
  • Casino Casino
  • Bingo Bingo
  • Sport Sport
  • Poker Poker
4

100% up to £100 Bonus

Payout Speed
Instant - 5 days
700
  • Excellent Selection of Slots
  • Plenty of Fast Payout Slots
  • Great Variety in Terms of Slot Developers
Claim Bonus
Alice Soule
"One of my favourite casino site designs, Hyper Casino looks unique while still providing all the best games."
Alice Soule
New players only. Min deposit £10. Wagering 45x bonus., max bet £5 with bonus funds. Live casino play excluded with bonus. 100% up to £100 bonus on 1st deposit. Welcome bonus excluded for players depositing with skrill or neteller. No max cash out on deposit offers. Eligibility is restricted for suspected abuse. 18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.
Payment Methods
  • Bank Transfer Logo
  • MasterCard Logo
  • Visa Debit Logo
  • skrill logo
  • Paysafecard logo
  • Neteller Logo
  • ecopayz logo
  • Trustly Logo in green
Payout Rate
Payout Rate
96.5%
Software providers
  • Just For The Win
  • SG Digital
  • High 5 Games
  • Amatic
  • Barcrest
  • Big Time Gaming
  • Blueprint
  • Elk Studios
Features
  • Casino Casino
  • Bingo Bingo
  • Sport Sport
  • Poker Poker
5

100% up to £100 + 100 Free Spins

Payout Speed
Instant - 4 days
1002
  • Fun PvP Slots Reward System
  • 100 Free Spins Available as Part of Welcome Bonus
  • Massive Slots Library
Claim Bonus
Alice Soule
"I really love the focus on tournaments at Duelz where you can play against other customers and try out the 13 magical spells."
Alice Soule
New players only. Minimum deposit: £20. Maximum £100 bonus. Max bet with an active bonus: £2. Wagering requirement 100% match bonus: 30x sum of deposit + bonus. Free Spins are given 20 per day on Book of Dead for 5 days in a row, log in is required. Winnings from Free Spins are credited as bonus money with a wagering requirement of 45x. Some games may not be played with a bonus. Games may contribute differently when wagering a bonus. www.begambleaware.org. 18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.
Payment Methods
  • MasterCard Logo
  • Visa Debit Logo
  • PayPal Logo
  • Trustly Logo in green
  • skrill logo
  • Paysafecard logo
  • Neteller Logo
  • MuchBetter Logo
Payout Rate
Payout Rate
97%
Software providers
  • Relax Gaming
  • Big Time Gaming
  • Blueprint
  • Endorphina
  • Evolution Gaming
  • Microgaming
  • NetEnt
  • Play'n GO
Features
  • Casino Casino
  • Bingo Bingo
  • Sport Sport
  • Poker Poker
6

100% up to £100 + 50 Free Spins

Payout Speed
1 - 7 days
1317
  • 50 Free Spins Available on Sign Up
  • Over 1000 Slots Available
  • Daily Bonus Spins Reward
Claim Bonus
Marcus Lawrence
"Daily bonuses can be a bit hit and miss, but for my money Play Frank offers some of the best in the UK online casino space."
Marcus Lawrence
New players only. Min deposit £20. Bonuses to a max of £100 + 50 spins. Wagering bonus 35x. Wagering bonus spins 35x. The winnings must be wagered within 21 days. Bonus T&Cs apply 18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.
Payment Methods
  • MuchBetter Logo
  • Bank Transfer Logo
  • Visa Debit Logo
  • MasterCard Logo
  • PayPal Logo
  • Paysafecard logo
  • skrill logo
  • Giropay Logo
Payout Rate
Payout Rate
95.3%
Software providers
  • Blueprint
  • Evolution Gaming
  • Eyecon
  • iSoftBet
  • Microgaming
  • NetEnt
  • Play'n GO
  • Pragmatic Play
Features
  • Casino Casino
  • Bingo Bingo
  • Sport Sport
  • Poker Poker
7

100% up to £200 + 100 Spins

Payout Speed
Instant - 6 days
900
  • Huge Slot Selection
  • Features All Major Slot Developers
  • Dedicated Jackpot Slots Section
Claim Bonus
Marcus Lawrence
"I'm a big fan of Luckster's instant payments made directly to and from bank accounts. Huge for fast withdrawal-hungry users."
Marcus Lawrence
Applies only to new depositing players. Minimum deposit £10. Wagering requirement x35. Offer valid for 24hr. Free spins included 3 deposits. 18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.
Payment Methods
  • MasterCard Debit Logo
  • visa debit logo
  • PayPal Logo
  • Paysafecard logo
  • skrill logo
  • Neteller Logo
  • Astropay Logo
  • Trustly Logo in green
Payout Rate
Payout Rate
97%
Software providers
  • Aspire Global
  • Slingo Originals
  • Skywind
  • Evolution Gaming
  • iSoftBet
  • Microgaming
  • NetEnt
  • NYX Gaming
Features
  • Casino Casino
  • Bingo Bingo
  • Sport Sport
  • Poker Poker
8

Bet £10 Get 30 Free Spins

Payout Speed
Instant - 4 Days
700
  • Brand New Casino
  • Slingo & Poker Available
  • No Wagering Required on Free Spins Welcome Offer
Claim Bonus
James Langley
"I love Bally's no wagering free spins welcome bonus — it's a fantastic way to find your feet at this online casino."
James Langley
*Click for full Rules. New members only, must opt in. New members only, must opt in. Min £10 deposit & wager (excl. sports betting). 30 day expiry from deposit. 18+. Free Spins: on Double Bubble. 1p coin size, max lines. Game availability & restrictions apply. 18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.
Payment Methods
  • Visa Debit Logo
  • MasterCard Logo
  • visa debit logo
  • visa electron logo
  • Apple Pay Logo
  • maestro logo
Payout Rate
Payout Rate
96%
Software providers
  • Blueprint
  • Evolution Gaming
  • Microgaming
  • NetEnt
  • Play'n GO
Features
  • Casino Casino
  • Bingo Bingo
  • Sport Sport
  • Poker Poker
9

up to £200 + 100 Bonus Spins

Payout Speed
1 - 5 days
400
  • Lots of High RTP Slots
  • Plenty of Progressive Jackpot Slots
  • 100 Free Spins Available When You Sign Up
Claim Bonus
James Langley
"If you're planning to stick around, Mr Play keeps the fun going with a welcome package on your first three deposits."
James Langley
First Deposit: 100% up to £50 + 20 Spins on Starburst *Min. Deposit £10 Second Deposit: 50% up to £75 *Min. Deposit £20 Third Deposit: 50% up to £75 *Min. Deposit £20 After first deposit made, customers will get + 20 Spin for the next 4 days 18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.
Payment Methods
  • Mobile Billing Logo
  • Visa Debit Logo
  • MasterCard Logo
  • PayPal Logo
  • Paysafecard logo
  • skrill logo
  • Neteller Logo
  • Bancontact Logo
Payout Rate
Payout Rate
99.7%
Software providers
  • Tom Horn
  • SG Digital
  • Williams Interactive
  • 1x2 Gaming
  • Betsoft
  • Big Time Gaming
  • Blueprint
  • Core Gaming
Features
  • Casino Casino
  • Bingo Bingo
  • Sport Sport
  • Poker Poker
10

up to £200 Bonus + 100 Free Spins

Payout Speed
Instant - 6 days
984
  • Claim 100 Free Spins
  • Almost 1000 Different Slots
  • 25 Progressive Jackpot Slots
Claim Bonus
James Langley
"I'm always up for some free play, and Spin Rio's sizeable welcome bonus works a treat — 100% up to £200 and 100 free spins."
James Langley
Terms and Conditions Apply. New Players only. 18+. Min First Deposit £10. Min Second and Third deposit: 20. Wagering requirement apply 35x. Offer valid for 72hr. Spins expire after 24hr. 100 spins includes 3 deposits. 18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.
Payment Methods
  • PayPal Logo
  • Paysafecard logo
  • skrill logo
  • Astropay Logo
  • astropay card logo
  • Trustly Logo in green
Payout Rate
Payout Rate
97%
Software providers
  • Bally
  • Big Time Gaming
  • Blueprint
  • Evolution Gaming
  • Microgaming
  • NetEnt
  • Play'n GO
  • Playtech
Features
  • Casino Casino
  • Bingo Bingo
  • Sport Sport
  • Poker Poker
11

Up to £200 + 100 Free Spins

Payout Speed
Instant - 4 Days
1000
  • Claim 100 Free Spins
  • Offers the Drops & Wins Slots Promotion
  • Low Wagering Slots Bonuses Available
Claim Bonus
Alice Soule
"What a great looking site! I enjoyed playing on Vegasland, especially as it offers such a huge amount of slots titles."
Alice Soule
18+. New depositing players only. Welcome package split over 3 deposits: Min 1st deposit £10. Min 2nd and 3rd deposit £20. 35x wagering requirement applies to match up bonus and spins. Spins credited in specific games. Spins expire after 24 hours. Terms and conditions apply. 18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.
Payment Methods
  • Visa Debit Logo
  • MasterCard Logo
  • Bank Transfer Logo
  • Trustly Logo in green
  • PayPal Logo
  • Astropay Logo
  • MuchBetter Logo
  • skrill logo
Software providers
  • Spinomenal
  • Dragon Gaming
  • Rubyplay
  • Blueprint
  • Elk Studios
  • Evolution Gaming
  • Microgaming
  • NetEnt
Features
  • Casino Casino
  • Bingo Bingo
  • Sport Sport
  • Poker Poker
12

Up To £200 + 100 Spins

Payout Speed
Instant - 6 days
751
  • Great for Progressive Jackpot Fans
  • Features the Best Slot Providers in the Industry
  • Great VIP Rewards for Slot Players
Claim Bonus
James Langley
"Queenplay has an impressive roster of payment methods, and it's a fantastic choice if you're looking for fast withdrawals."
James Langley
New players only. 18+. Min deposit £10. Wagering requirement apply 35x. Offer valid for 72hr. 100 spins includes 3 deposit. 18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.
Payment Methods
  • Mobile Billing Logo
  • Bank Transfer Logo
  • Visa Debit Logo
  • MasterCard Logo
  • PayPal Logo
  • Paysafecard logo
  • skrill logo
  • Neteller Logo
Software providers
  • Real Dealer
  • Blueprint
  • Evolution Gaming
  • Gamevy
  • Inspired Gaming
  • iSoftBet
  • Microgaming
  • NetEnt
Features
  • Casino Casino
  • Bingo Bingo
  • Sport Sport
  • Poker Poker
13

100% up to £100

Payout Speed
Instant - 5 days
791
  • Varied Slots Library
  • Lots of Progressive Jackpot Slots
  • Frequent Slots Promotions
Claim Bonus
James Langley
So good they named it twice! Great online casino with plenty of games and ongoing bonuses.
James Langley
New customers only, min deposit £20, wagering 40x, max bet £5 with bonus funds. Max bonus is 100% up to £100. No max cash out on deposit offers. Welcome bonus excluded for players depositing with Skrill or Neteller. No max cashout on deposit offers 18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.
Payment Methods
  • visa debit logo
  • Bank Transfer Logo
  • Paysafecard logo
  • skrill logo
  • Neteller Logo
  • Trustly Logo in green
Payout Rate
Payout Rate
96.5%
Software providers
  • Blueprint
  • Elk Studios
  • Evolution Gaming
  • IGT
  • Microgaming
  • NetEnt
  • NextGen Gaming
Features
  • Casino Casino
  • Bingo Bingo
  • Sport Sport
  • Poker Poker
14

100% up to £123

Payout Speed
Instant - 5 days
791
  • 10% Daily Cashback on Slots Losses
  • 10 Different Progressive Jackpots
  • All Withdrawals Processed Within 24 Hours
Claim Bonus
Robbie Evans headshot
More than lives up to its name, a great online casino experience with a generous welcome bonus.
Robbie Evans
Maximum bonus is £123. The minimum deposit requirement is £10. Max bet with bonus is £5, No max cash out, Wagering is 50x - Skrill & Neteller excluded, Eligibility is restricted for suspected abuse. 18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.
Payment Methods
  • Bank Transfer Logo
  • MasterCard Logo
  • Visa Debit Logo
  • Trustly Logo in green
  • skrill logo
  • Paysafecard logo
  • Neteller Logo
  • ecopayz logo
Payout Rate
Payout Rate
96%
Software providers
  • Amatic
  • Bally
  • Barcrest
  • Big Time Gaming
  • Blueprint
  • Elk Studios
  • Evolution Gaming
  • IGT
Features
  • Casino Casino
  • Bingo Bingo
  • Sport Sport
  • Poker Poker
15

Get 30 Free Spins or 50 Bingo Tickets

Payout Speed
Instant - 5 days
400
  • 30 No Wager Free Spins Available
  • Lots of Megaways Slots
  • Great Mobile App for Spinning Reels on the Go
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Alice Soule
"It was great to play games for free before using my own cash, and these are updated monthly to stave off any boredom."
Alice Soule
*Click for full Rules. New members only, must opt in. Min £10 deposit & wager. 30 day expiry from deposit. 18+. Free Spins: on Double Bubble. 1p coin size, max lines. Bingo: Advertised ticket value based on £1 tickets. Game availability & restrictions apply. 18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.
Payment Methods
  • Bank Transfer Logo
  • MasterCard Logo
  • Visa Debit Logo
  • visa debit logo
  • visa electron logo
  • PayPal Logo
  • skrill logo
  • Neteller Logo
Payout Rate
Payout Rate
97%
Software providers
  • Roxor Gaming
  • Ash Gaming
  • IGT
  • Microgaming
  • NetEnt
  • Novomatic
  • Red Tiger Gaming
  • Scientific Games
Features
  • Casino Casino
  • Bingo Bingo
  • Sport Sport
  • Poker Poker

Best Slots Sites in the UK by Category

🎁 Best UK Slot Site for Free Spins MagicRed
📚 Biggest Library of Slots in the UK  All British Casino
💸 Best UK Slot Site for Fast Withdrawals  Hyper Casino
🔣 Best UK Slot Site for Payout Rates Mr Play
🤑 Best UK Slot Site for Progressive Jackpots Spin Rio
⚙️ Best UK Slot Site for Software Developers  Luckster
🏆 Best UK Slot Site for Ongoing Slot Promotions VoodooDreams
📱 Best Mobile UK Slot Site Virgin Games

 

Our Picks for the Top UK Slot Sites Explained


Here are some examples of longstanding elites when it comes to UK online slot sites. The reviews below will give you a feel for the standard we're looking for when we're hunting down new UK slot sites to add to our rankings.

Name Slot games Bonus Score Claim Bonus Review Terms and conditions Information
Slot games :
571
WELCOME OFFER

100% up to £50 + 50 Free Spins

Our Score
8.5/10
Reviewed by James Langley
  • Slots: 571
  • Qualifying Slots:
  • Progressive Jackpot Slots: 20
  • Mobile Slots:
  • Payout: 96.5
  • Wagering: 30
  • Payout Speed: Instant - 5 days
One thing that's clear about VoodooDreams from the get-go is it does things a little differently to other top UK slot sites. Once I'd signed up, I immediately checked out the sidebar where you can access the 'duel' features. Here you'll get to face off against other players as you spin the best online slots — of which there are around 600 in the catalogue. By participating in these duels, you can rack up Spirit Points and Experience which can be traded in for prizes. It's an entertaining and unique twist on a loyalty scheme, and I love the extra sense of competition this slots site offers.
Like other slot sites, VoodooDreams has a welcome bonus to get you going. The deal here is a deposit bonus where you'll bag 100% up to £50 plus 50 free spins when you top up with £20 or more. The bonus credit has playthrough requirements of 30x the deposit plus bonus, and wagering contributions vary across games.
But the real jewel in the crown are the wager-free spins. These can be used on Book of Dead and any winnings are paid as real cash! In my book, that makes this one of the best bonus spins offers around, although keep in mind the spins expire after just three days.
18+ new players only. Maximum £50 bonus. Minimum deposit: £20. Deposit Bonus wins are capped at £500. Max bet with active bonus: £2. Wagering requirement 100% match deposit bonus: 30 times sum of deposit + bonus. Winnings from Free Spins are credited as Real Money without wagering requirement. Some games may not be played with an active bonus. Games may contribute differently when wagering a bonus. Deposit Bonus expires after 30 days if wagering requirement has not been met. Free Spins expire after 3 days. One bonus allowed per person, address, device, IP. www.begambleaware.org For full bonus terms and conditions, please read below. Responsible Gaming 18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.
Slot games :
1000+
WELCOME OFFER

50 Free Spins Upon Deposit No Wagering

Our Score
9.5/10
Reviewed by James Langley
  • Slots: 1000
  • Qualifying Slots:
  • Progressive Jackpot Slots: 6
  • Mobile Slots:
  • Payout: 98
  • Wagering: 0
  • Payout Speed: Instant - 6 days
In my opinion, MagicRed has one of the most worthwhile deposit bonuses of any slot site. When you sign up using our link and deposit £10, you'll get 50 no wagering free spins to use on Big Bass Bonanza. I won a few quid with mine, which I kept in my account to play games with in future. It's worth keeping in mind the bonus spins are valid for just 24 hours — don't get caught out as the bonus funds expire after this time.
What else makes MagicRed a top online slots site? For me, it's the cashier section. With six different e-wallets supported including AstroPay and MuchBetter, I was able to manage my money in a way that best suited me. My test withdrawal was speedy too and I received my money early the next day.
The games library itself is also one of the best around. Not many slot sites tout over 1,000 games, but MagicRed can proudly make this claim. And if you're a fan of the beloved Starburst slot game, Magic Spins Tuesday will let you bag up to 30 free spins to use on it each week when you deposit £20 or more.
18+. New Players Only. Terms and Conditions Apply. Available only on Big Bass Bonanza game. Min. Deposit £10. Offer valid for 24 hrs. No wagering required. See full terms
18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.
Slot games :
1600+
WELCOME OFFER

100% up to £100 + 10% Cashback

Our Score
9.5/10
Reviewed by James Langley
  • Slots: 1600
  • Qualifying Slots:
  • Progressive Jackpot Slots: 17
  • Mobile Slots: 661
  • Payout: 97.5
  • Wagering: 35
  • Payout Speed: Instant - 5 days
Undoubtedly one of the best online slot sites when it comes to sheer choice of games, I was delighted to dig into All British Casino's library. There were more than 1,600 video slots available for my perusal, offering access to everything from the latest releases and high RTP games, to enormous jackpots and even exclusive slots.
One thing I love about this site is its generous welcome bonus. New players get 100% up to £100 on minimum deposit of £20. I'm less keen on the 35x wagering requirements — and it's a shame you'll get only bonus funds, not bonus free spins — but this offer is nonetheless a highly flexible way to try your hand at some popular slots or find a new favourite. Another reason to give this slot site a try is the 10% cashback that can be recouped once a week. So if your luck hasn't been so great, you can get a little extra out of your budget.
As I play at several different online slots sites, easy access to my bankroll is a priority for me. I'm pleased to say All British Casino is a really good slot site when it comes to fast payouts. During my testing, I received a PayPal cashout within around six hours of requesting it.
#AD New customers only, min deposit £20, wagering 35x, max bet £5 with bonus funds. Max bonus is 100% up to £100. No max cash out on deposit offers. Welcome bonus excluded for players depositing with Skrill or Neteller. Cashback is cash with no restriction. Click here for full T&Cs
18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.
Slot games :
700
WELCOME OFFER

100% up to £100 Bonus

Our Score
9.5/10
Reviewed by James Langley
  • Slots: 700
  • Qualifying Slots:
  • Progressive Jackpot Slots: 12
  • Mobile Slots:
  • Payout: 96.5
  • Wagering: 45
  • Payout Speed: Instant - 5 days
If it's a big deposit bonus you're after, why not give Hyper Casino a try? At this slot site, you'll bag 100% up to £100 when you fund a new account with £10. That's exactly what I did, using my bonus credit to explore Hyper's fantastic catalogue of over 700 online slots. The bonus expiry is set at 30 days, giving you ample time to try out different slot games at your leisure.
I'd definitely like to see more competitive T&Cs on the bonus, with wagering requirements set at a rather steep 45x. You can't play live casino games or withdraw funds while you have an active bonus — if you try to, you'll forfeit any unused bonus funds.
That said, I do love this casino's commitment to speed and efficiency. With support for Trustly, Skrill, and Neteller, this is one of the best slot sites for fast payouts. During my tests, I got my Trustly withdrawal within just a few hours!
New players only. Min deposit £10. Wagering 45x bonus., max bet £5 with bonus funds. Live casino play excluded with bonus. 100% up to £100 bonus on 1st deposit. Welcome bonus excluded for players depositing with skrill or neteller. No max cash out on deposit offers. Eligibility is restricted for suspected abuse. 18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.
Slot games :
1002+
WELCOME OFFER

100% up to £100 + 100 Free Spins

Our Score
9.5/10
Reviewed by James Langley
One of the most unique slots sites on this list is Duelz. I'm a big fan of its thrilling player-vs-player loyalty scheme, and this gamified approach to rewards is a breath of fresh air. How does it work? As you spin the reels of your favourite titles, you'll take part in duels with other players at the site, dealing damage every time you win. After each duel, you'll rack up points which can later be traded in for goodies like free spins. I had a lot of fun with this aspect of the site, and it added a new layer of entertainment to the slots experience.

Speaking of which, there are many fantastic slots in the library of Duelz, with jackpot slots, Megaways, and avalanche reels galore. I was also pleased with the sizable welcome bonus of 100% up to £100 and 100 free spins on Book of Dead, which let me try out some new titles I'd not played before without having to spend my own cash. That said, the wagering requirements are a little steep here — 30x your bonus plus deposit, and 45x any free spins winnings.

In terms of payment options, Duelz does an excellent job. I used Trustly for both my deposit and withdrawal during testing, and the process was smooth, but alternative options include PayPal, Skrill, Neteller, and Paysafe, with all but the latter supporting instant withdrawals.
New players only. Minimum deposit: £20. Maximum £100 bonus. Max bet with an active bonus: £2. Wagering requirement 100% match bonus: 30x sum of deposit + bonus. Free Spins are given 20 per day on Book of Dead for 5 days in a row, log in is required. Winnings from Free Spins are credited as bonus money with a wagering requirement of 45x. Some games may not be played with a bonus. Games may contribute differently when wagering a bonus. www.begambleaware.org. 18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.
Slot games :
1317
WELCOME OFFER

100% up to £100 + 50 Free Spins

Our Score
7.8/10
Reviewed by James Langley
  • Slots: 1317
  • Qualifying Slots:
  • Progressive Jackpot Slots: 39
  • Mobile Slots: 529
  • Payout: 95.3
  • Wagering: 35
  • Payout Speed: 1 - 7 days
With more than 1,300 games in its library, PlayFrank is undoubtedly one of the best UK slot sites. Not only was I impressed by the depth and variety found within its catalogue of online slot games, but it offers a sizable welcome bonus for new players as well. There are two portions — a deposit bonus of 100% up to £100, and 50 free spins.
One thing I really like about PlayFrank is the fact its ongoing offers encourage players to try out different video slots. At the time of writing, I found weekly offers such as 50 free spins on Book of Dead every Monday, 50 free spins on Ghost of Dead on Fridays, and the Sunday Catch of the Day with 50 free spins on Big Bass Bonanza. Clearly, this is a slots site that treats its customers right!
Throw in a fantastic range of payment methods, daily challenges to complete, and next-day payouts, and you've got one of the best slots casinos in the business.
New players only. Min deposit £20. Bonuses to a max of £100 + 50 spins. Wagering bonus 35x. Wagering bonus spins 35x. The winnings must be wagered within 21 days. Bonus T&Cs apply 18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.
Slot games :
900+
WELCOME OFFER

100% up to £200 + 100 Spins

Our Score
9.3/10
Reviewed by James Langley
  • Slots: 900
  • Qualifying Slots:
  • Progressive Jackpot Slots: 12
  • Mobile Slots:
  • Payout: 97
  • Wagering: 35
  • Payout Speed: Instant - 6 days
While it may not be the first name on our slot site list with an Irish theme, Luckster brings plenty to the table. It offers one of the biggest welcome bonus packages around, totalling up to £200 spread over your first three deposits.
There are also 100 free spins up for grabs — I really like how Luckster has split these up between five different titles so you get to try a mix of online slot games on the casino's dime. While I'm less keen on the 35x wagering requirements, this welcome bonus is nonetheless a solid choice for online slots due to its size and flexibility, and there's just a £10 minimum deposit to get involved.
Luckster is operated by Marketplay, and I'm always a big fan of this company's slots sites. They tend to excel when it comes to payments, offering the latest deposit methods alongside tried-and-tested favourites. Withdrawals are processed quickly, and I received mine within around 12 hours of requesting it. It's clear to see Luckster has earned its place among the best online casinos with slot games!
Applies only to new depositing players. Minimum deposit £10. Wagering requirement x35. Offer valid for 24hr. Free spins included 3 deposits. 18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.
Slot games :
700+
WELCOME OFFER

Bet £10 Get 30 Free Spins

Our Score
9.5/10
For me, the star of the show at Bally Casino is the welcome bonus. When you sign up and play £10 at the site, you'll bag 30 no wagering free spins on Secrets of the Phoenix Megaways. That means any winnings are yours to withdraw, or take forward to wager on slots at the site. Although the bonus isn't very large, it's potentially more valuable if your priority is the best chance of cashing out the bonus.

Signing up at Bally Casino was a smooth process, as was making my first deposit, so it wasn't long before I could dig into the slots. Long-time favourites like Starburst and Big Bass Bonanza are available, but Bally regularly adds new releases to its library so there's always something fresh to try.

Another thing I like about this site is its ongoing promotions. There are daily free games to play where there's a chance of picking up free spins and bonus credit, along with Drops & Wins tournaments for an extra thrill.

The icing on the cake? Bally Casino has a mobile app. My only complaint is the limited number of payment methods supported, although with PayPal and Apple Pay included, I wasn't too disappointed.
*Click for full Rules. New members only, must opt in. New members only, must opt in. Min £10 deposit & wager (excl. sports betting). 30 day expiry from deposit. 18+. Free Spins: on Double Bubble. 1p coin size, max lines. Game availability & restrictions apply. 18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.
Slot games :
400+
WELCOME OFFER

up to £200 + 100 Bonus Spins

Our Score
9.5/10
Reviewed by James Langley
  • Slots: 400
  • Qualifying Slots:
  • Progressive Jackpot Slots: 6
  • Mobile Slots: 356
  • Payout: 99.7
  • Wagering: 35
  • Payout Speed: 1 - 5 days
To be honest, I remain a little confused by Mr Play’s branding — especially the emphasis on the moustache theme — but I can have no complaints about the size and quality of the slots on offer here.
There are a tremendous number of different slots from some of the industry’s most cutting-edge software developers, and I like the fact that you can search for these providers’ games by entering their names in the search bar. I also appreciate the addition of a ‘Drops & Wins’ filter for those who like to play Pragmatic Play’s popular series of slots.
Having said that, I think Mr Play could do much more when it comes to navigability. If you don’t know the specific name of your favourite slot or developer, you may find yourself having to do some significant scrolling when looking for the right game. The only other filterable categories are ‘Featured Games’, ‘New’ and ‘Video Slots’, which are all extremely vague.
However, this remains one of the UK’s best slots casinos, and Mr Play will offer you an extremely generous matched deposit of up to £200 plus 100 free spins. it doesn’t get much better than that, especially if you’re a slots fan!
First Deposit: 100% up to £50 + 20 Spins on Starburst *Min. Deposit £10 Second Deposit: 50% up to £75 *Min. Deposit £20 Third Deposit: 50% up to £75 *Min. Deposit £20 After first deposit made, customers will get + 20 Spin for the next 4 days 18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.
Slot games :
984+
WELCOME OFFER

up to £200 Bonus + 100 Free Spins

Our Score
9.5/10
Reviewed by Marcus Lawrence
  • Slots: 984
  • Qualifying Slots:
  • Progressive Jackpot Slots: 25
  • Mobile Slots:
  • Payout: 97
  • Wagering: 35
  • Payout Speed: Instant - 6 days
Spin Rio is a colourful new slot site that burst onto the scene in 2021 with a host of exciting features, so I was looking forward to trying it out.
The welcome bonus is a staggering combination of 100 free spins and up to £200 in matched deposit bonus funds, which is, with Mr Play, one of the biggest sign up packages of all the UK slot sites I've reviewed here at TopRatedCasinos. However, there are some conditions. If you were looking to receive the full 100 free spins — which come with wagering requirements of 35x — you would have to spend £50 over your first three deposits. This doesn’t sound great, but I’ve come to accept it as part and parcel of the online casino experience, and it still gives you plenty of spins and bonus funds to explore the site with.
The site also comes with a fresh, Brazilian-themed sight design that is a real joy to navigate, and, as its name might suggest, comes with hundreds and hundreds of slot games.
Terms and Conditions Apply. New Players only. 18+. Min First Deposit £10. Min Second and Third deposit: 20. Wagering requirement apply 35x. Offer valid for 72hr. Spins expire after 24hr. 100 spins includes 3 deposits. 18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.

Choosing the right slot site for you all depends on your needs and preferences. Some players might be looking for the latest video slots, while others may prefer to stick with their favourite classic slots. Some might be seeking the biggest progressive jackpots or online slot games with a high max bet. And those who like to play via their phone or tablet will likely be seeking a site offering plenty of mobile slots.

For others, it’s all about the welcome bonus — whether it’s the biggest deposit bonuses, a sizable bundle of free spins, or exciting reload offers for existing customers. Perhaps you’re looking for no wager slots bonuses? Or maybe you’re just looking for new slot sites that offer something different to the norm.

Our experts have put in the legwork and identified the strengths of each online casino we review. You’ll find our top selections in different categories below, making it easy to pick a slot site that’s the perfect fit for you.

Best Sites for Slot Bonuses + Free Spins

Want to maximise the value of your bankroll? The slot sites below have some of the best welcome bonus packages around — and what better way to explore the different slot games on offer than with a slots bonus?

Our Top Picks

  • Luckster: This Irish-themed site invites new players through its doors with a welcome bonus worth up to £200 split over your first three deposits. And if that wasn’t enough, you’ll also bag 100 free spins which can be played on five selected slots.
  • Mr Play: Another excellent choice for slots bonuses is Mr Play. Again, you can land up to £200 in bonus funds plus 100 spins, with these 20 of these bonus spins credited every day. Wagering requirements sit at 35x.
  • Spin Rio: The party doesn’t stop at Spin Rio, a carnival-themed site that also endows new customers with a deposit bonus up to £200 and 100 free spins.

Best Slot Sites for Progressive Jackpots

Did you know Mega Moolah holds the record for the biggest jackpot paid out by an online slot machine, at over £13 million? It’s easy to see why these slots are popular, giving players a chance — albeit a miniscule one — at a life-changing sum of money. Below are our favourite online casino sites for jackpot slots.

Our Top Picks

  • Duelz: This slot site touts around 30 different jackpot slots, including loads of games in the Mega Moolah network.
  • Aztec Wins: We counted over 60 jackpot slot games at Aztec Wins.
  • LuckLand: You’ll find heaps of Mega Moolah and Jackpot King slots at this online casino, including branded slot games like Rick and Morty and The Goonies.

Best Slot Sites for RTP

Pure and simple, many players are looking for casino games with the best payouts. Below are some of the top slot sites for RTP (return to player) — a percentage that indicates the amount a slot pays out as winnings compared to what’s bet on it. That said, keep in mind you’re never guaranteed a win!

Our Top Picks

  • All British Casino: The Anglophiles at All British Casino pay out an estimated 97.5%.
  • VoodooDreams: This thrilling slot site with player-vs-player features has an abundance of high RTP slots.
  • Hyper Casino: Sign up at Hyper Casino and you’ll discover a range of fantastic top-paying slot games in its expansive library.

Top Online Slot Sites Compared

Slot Site Slots Bonus Wagering Requirement Slot Games Jackpot Slots RTP
All British Casino 100% up to £100 plus always 10% cashback.
Min deposit £20.
35x the bonus 800+ 9 97.50%
VoodooDreams 100% up to £50 plus 50 no wagering free spins.
Min deposit £20.
30x deposit plus bonus
Free spins: No wagering
751 20 96.50%
Aztec Wins 100% up to £200.
Min deposit £10.
65x the bonus 500 40 96%
Rainbow Riches Play £10, get 30 no wagering free spins. No wagering 475 14 96%
Hyper Casino 100% up to £100.
Min deposit £10.
45x the bonus 700 12 96.50%
MagicRed 100% up to £35 plus 50 bonus spins.
Min deposit £10.
35x the bonus 1000 6 98%
Play Frank 100% up to £100 plus 50 bonus spins.
Min deposit £20.
35x the bonus 1317 39 95.30%
Luckster 100% up to £200 + 100 Spins.
Min deposit £10
35x the bonus 900 12 97%
Mr Play 1st deposit (min £10): 100% up to £50 plus 20 spins.
2nd and 3rd deposit (min £20): 50% up to £75 plus 40 spins.
35x the bonus 400 6 99.70%
Spin Rio 1st deposit (min £10): 100% up to £50 plus 20 spins
2nd and 3rd deposit (min £20): 50% up to £75 plus 40 spins
35x the bonus 984 25 97%
Vegasland 1st deposit (min £10): 100% up to £50 plus 20 spins
2nd and 3rd deposit (min £20): 50% up to £75 plus 40 spins
35x the bonus 1000 0 96.20%
Queenplay 1st deposit (min £10): 100% up to £50 plus 20 spins
2nd and 3rd deposit (min £20): 50% up to £75 plus 40 spins
35x the bonus 751 11 96.15%
Luckland 100% up to £50 plus 50 bonus spins.
Min deposit £20.
40x the bonus 854 13 96.70%
Duelz 100% up to £100 plus 100 free spins.
Min deposit £20.
30x deposit plus bonus
45x free spins winnings
1002 42 97%
CasinoCasino 100% up to £100.
Min deposit £10.
40x the bonus 791 124 96.50%
Fun Casino 100% up to £123.
Min deposit £10.
50x the bonus 791 14 96%
Virgin Games Play £10, get 30 no wagering free spins. No wagering 400 40 97%

Our Team’s Online Slot Games Recommendations


With literally thousands of slots at your disposal, it’s not easy to know where to begin. Players tend to stick to a handful of games they know they like — here are some of our favourites if you fancy branching out.

Name Release year Developer RTP Variance Paylines Min bet Max bet Max bet Mobile Claim Bonus Review Information
Release year
Developer
Nolimit City
RTP
96.04%
VARIANCE
High
Paylines
75712
Min bet
25p
Max bet
£100
Mobile
Progressive
Claim Bonus
Available at VoodooDreams
How would you have dealt with the heightened tension of submarine warfare during WWII? This Nolimit City slot is inspired by the 1981 German war film, Das Boot, where players must navigate radars, torpedoes, explosives, and the sanity of other crew members. The eerie, hollow soundtrack takes the authentic sounds of the submarine and splices it with cinematic booms and riffs from German prog rock.
This slot plays out on an irregular reel: in the base game, there are two rows in columns one and six, three rows in columns two and five, and four rows in the middle two columns, generating 576 different paylines. However, the xWays symbol, which only appears on reels two and five, can split one symbol into three, stretching the maximum payline number all the way to 75,712. With bomb wilds, multiplier wins, two different free spins bonuses, and a return to player (RTP) of 96.04%, this is an atmospheric and action-packed slot.
Das xBoot Slot Gameplay
Pros
  • Great theme and sound effects
  • Wilds, expanding wilds, scatters and multipliers
  • Two free spins bonuses
Cons
  • Minimum bet of 25p
  • Bonus features are quite complicated
Release year
Developer
Push Gaming
RTP
96.4%
VARIANCE
High
Paylines
5
Min bet
10p
Max bet
£100
Mobile
Progressive
Claim Bonus
Available at LeoVegas
The differences between Jammin Jars 2 and Das xBoot really epitomise just how diverse the world of online slots is. In this fun-loving title from Push Gaming, head to the disco with DJ Jammin Jar and look for fruity combinations on the 8x8 grid. You’ll need to land a minimum of five of the same fruits together on the reels to score a winning combo. When you do so, those symbols will explode and be replaced by new ones. If your win is adjacent to a fruity jar symbol, you’ll roll on a multiplier for the next win — just how it worked in this slot’s predecessor. The jar multipliers also act as the game’s scatter, and landing three at once will launch a round of free spins.
You’ll also notice a bar being filled to the left-hand side of the screen when you land a gold record anywhere on the grid. When you collect enough of these smash hits, you’ll trigger the Giga Jar, showering the dancefloor with big wild symbols. This high volatility slot comes with a funky soundtrack and an RTP of 96.4%.
Jammin Jars 2 Slot Gameplay
Pros
  • 10p minimum bet
  • Advances on popular original
  • Easy-going and fun theme
Cons
  • Bonuses are hard to trigger
Release year
Developer
Relax Gaming
RTP
98.12%
VARIANCE
High
Paylines
243
Min bet
10p
Max bet
£100
Mobile
Progressive
Claim Bonus
Available at Barz
Relax Gaming is known for producing cinematic slots, with elaborate and detailed video introductions to all their releases. Marching Legions is no different, transporting players to a highly stylised interpretation of ancient Rome and its bloody battles. The game will appear simple at first — it takes place on a 5x3 grid — but its bonus features are entirely unique.
The soldiers are the highest-paying symbols, and if a stack of three appear in the same column, they’ll march across the reels, stopping at each one they pass as they travel west. The remaining reels will continue to spin until the legion reaches the end of the grid, forming new combinations at each opportunity. Once the first legion makes it off the grid, a tally will start to form in the helmet in the top-left of the screen; when this helmet is filled five times, a round of free spins will be triggered. At 98.12%, Marching Legions is known for having one of the highest RTP rates going.
Marching Legions Slot Gameplay
Pros
  • High RTP of 98.12%
  • Excellent bonus feature
  • Great theme
Cons
  • Only one bonus feature
  • Hitting free spins bonus requires patience
Release year
Developer
NetEnt Casinos
RTP
97.04%
VARIANCE
High
Paylines
15
Min bet
15p
Max bet
£150
Mobile
Progressive
Claim Bonus
Available at Dove Slots
There’s a damsel in distress in NetEnt’s Steam Tower, and your task — as some kind of Victorian era Inspector Gadget — is to climb the 16 floors to rescue her. To the side of the screen the tower meter will track your progress and record your multiplier level, which increases with every floor the engineer manages to reach. The tool serves as a wild, and if you manage to trigger the stacked wild, you’ll be rewarded with ten free spins.
There’s a minimum bet of 15p and a maximum of £150, with a top win of 2,000x the stake. Steam Tower is classed as a medium volatility slot, and it comes with an RTP of 97.04%.
Steam Tower Slot Gameplay
Pros
  • Good balance between standard gameplay and bonuses
  • 15p minimum bet
Cons
  • Theme could be more interesting
Release year
Developer
Scientific Games
RTP
96%
VARIANCE
High
Paylines
243
Min bet
8p
Max bet
£88
Mobile
Progressive
Claim Bonus
Available at Dove Slots
88 Fortunes is a collaborative effort between Bally and Light & Wonder, which takes the sounds and colours of China and places them on the reels. This high volatility slot has an RTP of 96%, 243 paylines, and a minimum bet of just 8p.
Pay attention to the fu (bat) symbol here, which acts as the wild and forms combinations with all other symbols. If you land three, four, or five gong symbols on the reels, you’ll receive ten free spins as a bonus. There are also four jackpot prizes up for grabs in this slot, each with their own grade of riches. If you want to be in with a chance of landing the grand prize, you’ll need to place the maximum wager on all paylines.
88 Fortunes Slot Gameplay
Pros
  • Lots of bonus features
  • Four progressive jackpots
  • Minimum bet of 8p
Cons
  • Unoriginal theme
  • High volatility

Highest RTP Slot Games in 2024

Playing slots with high RTP (return to player) rates are your best shot at cutting down on your losses, so we’ve compiled a list of all the best payout slots in the UK. That said, it’s important to remember that these are calculated over millions of spins and have no real bearing on your individual session, so don’t expect to always get your money back.

Slot Game RTP UK Slot Site
Ugga Bugga 99.07% Spin Rio
Mega Joker 99.00% All British Casino
Ooh Aah Dracula 99% MagicRed Casino
Jackpot 6000 98.90% Duelz
The Catfather 98.10% All British Casino
Rainbow Riches
Reels of Gold
98.00% Hyper Casino
Blood Suckers 98.00% Duelz
Jokerizer 98.00% Vegasland
Steam Tower 97.04% VoodooDreams
Immortal Romance 96.86% Bally Casino

Top Progressive Jackpot Slot Games in 2024

Progressive jackpots are where the big money is won on online slots. The all-time record jackpot on Microgaming’s Mega Moolah — undoubtedly the most popular and potentially lucrative of all progressive jackpots — is a staggering €19.4 million. However, there are plenty of other jackpot slots to get involved with. Here are our picks for the top 5 in the UK, with their current jackpots and where you can find them.

Jackpot Slot Current Jackpot UK Slot Site
Mega Moolah £3,495,269 Virgin Games
Mega Fortune £1,437,870 Hyper Casino
Hall of Gods £1,193,915 All British Casino
Arabian Nights £590,711 VoodooDreams
Divine Fortune £162,574 CasinoCasino

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How We Review UK Online Slots Sites

Reviewing online slot sites is a major part of what we do here at TopRatedCasinos. We’re committed to providing accurate, honest, and thorough accounts of the top slot sites available to UK players. In order to do so, we take a look at a number of salient factors, all of which combine to offer a reliable overall impression of a casino. Here are our main areas of concern during the reviewing process.

Licensing

We’re only interested in reviewing safe and reputable online casinos. For a UK audience, this means the site must have a licence from the UK Gambling Commission — one of the leading regulators of the online gambling industry. Licences of this kind commit casinos to standards of fair play, regulation of games and payout speeds, as well as certain safeguarding conditions around responsible gambling. 

You won’t ever find an unlicensed casino in our list of recommendations, which means you can be confident your information is protected when playing at one of our reviewed casinos. Never place a bet at an unlicensed site.

Slots Library and Other Games

Naturally, an in-depth review of the casino’s slots library is essential in determining the best sites in this field. Modern online slot machines not only play around with themes and bonuses, but also with the very mechanics that underpin these games. We want to see variety across all of these creative options: themes stretching from ancient Rome to outer space; free spins rewards and other bonus opportunities; and slots that run on three reels, Megaways paylines, and everything in between. 

Of course, slots aren’t all that’s on offer at online casinos. Table games such as blackjack, roulette, and baccarat must be well covered, and there should be a healthy volume of live casino experiences available too. Slingo, bingo, poker, scratch cards, and lottery-style instant games round out the libraries at the best performing casinos in this category.

Bonuses and Promotions

Our readers are perhaps most interested in this part of our review, but our overriding message here is not to be seduced by the headline offer. Welcome bonuses are often a great way to kickstart your time at a new casino, but make sure you’ve read the terms and conditions in full so that you understand what’s expected of you. Stipulations like wagering requirements, game weightings, payment restrictions, winning caps, and time limits will play their part — these are all areas of interest during our reviewing process.

We also value those sites that reward existing members with consistent promotions. There are many ways sites can provide this, and we give full marks to those that do so with creative flair. Duelz and VoodooDreams are leading examples of casino sites excelling here thanks to their unique player-vs-player loyalty schemes.

Software

Closely tied to our assessment of games libraries is a review of the casino’s partnerships with software developers. The popularity of online gambling has given rise to a rich ecosystem of creative studios all vying for the attention of casinos and their players. Titans of the industry include names like Microgaming, NetEnt, and Evolution Gaming — we always expect to see names as big as these — but diversity of software is a great way of ensuring diversity of entertainment, which is why we also like to see space given to smaller names looking to muscle in on the competition. After all, you never know when the next powerhouse will emerge.

Fast Withdrawals and Payments

It’s quite simple: we want to see as many payment options as possible in a casino’s cashier section. Not only does this provide customers with the greatest convenience, but it’s also the best way of opening up players to the possibility of fast withdrawals. In our minds, a fast withdrawal is one that lands within 24 hours of the request — but full marks go to sites that achieve this feat within four hours or even instantly.

We expect to see debit cards and at least one e-wallet available, but the top sites here will include many e-wallets, as well as prepaid cards, Google Pay or Apple Pay, bank transfer systems like Trustly, and even pay by phone providers such as Boku. The more the merrier, but it’s the ability to process withdrawals at speed that really stands out during our reviews.

Mobile

Online casinos today are enjoyed on desktop and on mobile in equal measure. Therefore, every casino we review must have a well-optimised mobile site catering to the modern player. This means the mobile casino has been adjusted for smaller screens, and that the playing experience is free of technical glitches and slow gameplay. We expect this as a minimum.

Going above and beyond are those slot sites that have developed their own dedicated mobile app for both Android and iOS devices. There’s a whole host of player benefits to using these apps: faster loading times, customisable homepages, app-specific offers, and the ability to keep abreast of every bonus and promotion through the app’s push notifications. For these reasons and more, we favour casinos that add this string to their bow, and encourage players to download apps wherever possible.

Site Design and UX

There are a lot of online casinos out there. One way in which the best sites distinguish themselves from the rest is by taking extra care when it comes to aesthetics. This might not be the most important consideration when you’re searching for a new slot site, but there’s no doubt that quality design makes a noticeable difference to the overall experience of signing up, browsing the library, and playing casino games. 

Bold colour schemes, unique themes, and sensible and helpful categorisation is what we’re looking for here. And of course, we expect sites undergoing our review to be free of technical glitches — particularly during gameplay. 

Customer Support

Every now and then you might need to get in touch with the casino with a simple query. In those instances, you don’t want to be waiting for an email response for several days, or to be held on hold at the end of the phone line. The highest performing slot sites in this part of our review solve this problem through live chat services, where polite and prompt customer agents are on hand to solve any problem, big or small. Full marks to those sites that offer this service round the clock. 

We appreciate that some customers prefer older forms of customer support channels, so we still like to see email and phone support made available. A helpful FAQs section is always good, and extra points go to those casinos resolving customer queries through active social media accounts. 

Our Experience

There are other areas of our reviewing process — not least our general experience of the casino. Were there any standout features of the site we hadn’t seen anywhere else? How did we feel during the sign-up process, while browsing the games, and in the cashier section? Were there any technical or aesthetic issues? If so, how good was the quality of the live chat service? These things all combine to paint an overall impression of the casino.

At the end of the day, it’s our reviewers’ personal experiences that are why our readers trust us. By testing out each casino for ourselves, we’re in the perfect position to give you our unbiased and honest opinion of every site we recommend.

Our Favourite Slots Software Providers

Developing a slot is a blank canvas. Some software providers like to imbue their games with tales from ancient mythologies, while others find wonder in the mundane. It’s the beauty of the genre: no theme is too outlandish, whacky, or beyond the realms of possibility. It’s one of the reasons why we like to see a diverse representation of game developers during our reviews — so that you, the player, can experience it all. Here are some of our favourite slots creators. 

Nolimit City

Nolimit City’s games deal with the grit and dirt of life. From Folsom Prison to Pearl Harbour, the prominent themes of this developer’s slots are conflict, violence, and society’s seedy underbelly. Releases such as Das xBoot and San Quentin xWays have elevated Nolimit in recent years; this trademark ‘x’ refers to Nolimit’s invention of a new slot mechanic, where reels are split after they land to generate increased payline opportunities. Based in Malta and Sweden, Nolimit has been developing online slots since 2013.

In Norse mythology, Yggdrasil refers to a sacred tree placed at the centre of all life, where gods assemble daily to help govern the world around them. Now, the Yggdrasil gaming studio doesn’t claim to be as cosmologically significant, but it gives an indication of the kind of slots released under its name: highly referential, highly stylised, with bold colour schemes and themes. Valley of the Gods and Vikings Go Berzerk are perhaps its most famous products, both of which chime well with Yggdrasil’s aesthetic. Founded in 2013, Yggdrasil has offices in Malta, Sweden, Poland, and Gibraltar.

Known in the industry as one of the ‘Big 3’ — alongside Microgaming and Playtech — NetEnt has been creating online casino games since 1996, placing it at the very inception of online gambling. In recent years, it’s perhaps the only developer that’s fully justified its position in that trio. NetEnt was involved in a major acquisition of $1.8 billion in 2020 at the hands of Evolution Gaming, forming a landmark partnership and consolidating its position as a leading developer of slots. Some of the biggest releases of the last decade have emerged from the NetEnt studio, including Starburst, Gonzo’s Quest, and Aloha! Cluster Pays. NetEnt’s three offices are in Sweden, Malta, and the US.

screenshot of netent slots

Formerly known as Scientific Games, Light & Wonder is a truly global online gaming brand, with offices across the Americas, EMEA, and APAC regions. Originally founded back in 1973, this developer has had to move with the times, and its rebranding to Light & Wonder in 2022 is just one further example of its success in doing so. You might be familiar with classic slots released under the SG brand such as Rainbow Riches and 88 Fortunes. As Light & Wonder, this developer has dazzled slot players in recent years with games like Invaders Megaways.

Play’n GO’s initial concept was to create games exclusively for the mobile market. As a result, it became known for developing slots that were sharp, snappy, and engaging — its Rich Wilde series is perhaps the best-known example here, often used as part of welcome packages to entice new players to sign up at casino sites. Since its founding in 2005, Play’n GO has continued to grow in influence, regularly entering the market with instant classics such as Reactoonz and Moon Princess. Play’n GO is based in Malta, Hungary, Sweden, and the Philippines.

Online Slots Guides

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Our comprehensive guide explains how to play slots, what each of the common terms mean, and what to look out for from each game.
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One of the humble slot's most curious qualities is variance, or volatility. Our guide breaks the concept down and explains how it affects a slot's behaviour.

Frequently Asked Questions

  • Yes. Every slot site on listed at TopRatedCasinos holds a UKGC licence. The UKGC monitors its licensees and audits their games to check for fairness and the accuracy of advertised RTP. In addition this, UK licensed casinos are held to high standards when it comes to protecting vulnerable players and player information. If you’re ever in doubt about a site’s licence status, check the UKGC’s public register.

  • No. Winning at slots comes down entirely to chance and, unlike poker or blackjack, it doesn’t require any skill. This means there’s nothing you can do to increase your chances of landing a winning symbol combination.

  • While some slot games pay out as much as £400,000, the amount you can win depends on how much you bet, and whether you land lucky bonus symbols to boost your winnings. If you’re playing progressive jackpot slots, the amount you win will depend on the size of the jackpot- these can reach well into the millions!

  • No. It’s unlikely that you’ll find no deposit free spins with no wagering requirements at UK slot sites – especially as a welcome bonus. Casinos might offer similar deals as part of a happy hour promotion or loyalty reward program, but you’ll almost always need to have made a deposit in the past.

  • This depends on the number of reels, the number of symbols on the reels and the number of paylines you bet on. The more simple the slot game, the better your odds for landing a winning combination. For example, if you bet on a 3-reel slot game with seven symbols on each reel, the chances of you landing 3 matching symbols is 1 in 343. However, if you’re playing a 5-reel slot with 10 symbols on each, you’re in with 1 in 100,000 chance of winning.

  • Yes. While there’s a handful of online casinos that are solely dedicated to slot games, most UK slot sites also offer a selection of other games. While roulette, blackjack and baccarat are the most common selection, some also offer video poker and live dealer casino games.

  • Slot developers aren’t currently required to state their slot titles’ volatility, or variance. While some developers include this information alongside the slot’s RTP, many slots have had their volatilities worked out by online communities comparing their experiences. If the slot volatility isn’t stated at the online casino in question, a quick search on Google can give you an idea of what to expect.

  • Developers and online casinos are required by licensing conditions to state every slot game’s RTP. Generally, this information is included alongside the paytable, which can be accessed by clicking the small ‘i’ icon on the slot’s display. If you can’t find the RTP, the online casino’s customer support team will be happy to help.

  • Yes. However, while you can win real money with a casino bonus, you’ll need to be mindful of the terms and conditions. Most bonuses are tied to wagering requirements which lock your bonus-related winnings away until you’ve wagered the bonus value a certain number of times over. For free spins, the wagering requirements will be calculated using the value of your free spins winnings. Details of this, and other restrictions, will be listed in the bonus’s terms and conditions, so be sure to read the fine print.

  • If your online slot site offers fast withdrawals, you’ll usually need to use an e-wallet such as PayPal, Skrill, or Neteller to take advantage of the service. Payout speeds for each accepted payment method are typically listed in the site’s terms of service but, failing that, the customer support team will be happy to give you the information.

  • Real money slots are a perfectly legal way to gamble, and the games available will be held to strict levels of fairness provided the online casino in question is licensed by the UK Gambling Commission (UKGC).

    Never play at an online casino that doesn’t have a UKGC licence, as unlicensed sites have no guarantees or protections in place regarding fair play, ethical behaviours and transaction security.

    One of the licensing obligations for operators is to conduct regular audits of the random number generator (RNG) tech powering their slots’ randomness, so you can be sure that licensed sites are offering slots that aren’t rigged.

  • Like the casinos themselves, each mobile app is different, so a preference will depend on each individual’s tastes and playing habits. That said, some of our favourite mobile slot apps include Race Casino, Barz and Scores Casino.

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Guy is a Writer and Editor for TopRatedCasinos.co.uk with three years’ experience in the online gambling space. You’ll find his name across the site, from detailed guides on all things to casino to reviews of the latest brands in the market. Outside work he’s a big fan of football and cricket, often found lamenting the fortunes of his beloved Tottenham Hotspur, and slings himself around the world as often as he can.

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James is a Content Writer and casino expert at TopRatedCasinos.co.uk, joining us in 2021 and totting up three years’ experience in the online gambling space so far. He regularly contributes in-depth guides and reviews for the site, alongside editing and refining copy. James is also responsible for tinkering with different elements of TopRatedCasinos to make it even better for our users, and has a hand in designing some of the new features we add to the site. Outside work James is a guitarist, all-round music enthusiast, and long-distance runner.

References

  1. UKGC - follow link for more information on how the gambling industry works
  2. Britannica - an academic breakdown of how slots function
  3. www.BeGambleAware.org - a leading UK charity focused on promoting healthy gambling habits, as well as offering support for problem gamblers
  4. NetEnt
  5. eCOGRA
  6. TCG - Remote Technical Standards
  7. International Association of Gaming Regulators
  8. PayPal
  9. iGamingFuture