Best Slot Sites 2021

Play the UK's top online slots

Top Online Slot SItes

Finding the best online slot websites to suit your needs can be difficult. With every site claiming to be the best site for slots, how can you tell which is the best to sign up and deposit with? 

We’ve reviewed and rated the country’s most trustworthy slots brands to provide an up-to-date list of the latest slot machine bonuses available to claim now. Every slots site in our list is fully licensed by the UK Gambling Commission.

Take your pick of the top UK slot sites and games in 2021 here.

Related categories: Real Money Slot Sites | New Slot Sites | Mobile Slot Sites

Top Online Slot SItes
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We rely on our relationships with partner sites to keep our service free. We receive compensation from many of the brands featured on Online Bingo UK which may influence how we display them.

However, we only recommend brands that we believe are safe, fair and trustworthy. The commission we receive does not affect the impartiality of our content.

If you’re feeling patriotic and want a site celebrating Great Britain, All British Casino is decked out in red, white and blue. Join today and deposit to receive up to £100 in bonus cash, plus lifetime 10% cashback on lost deposits! Choose from a huge variety of Microgaming casino games including Immortal Romance, Book of OZ and Thunderstruck II.

Terms & Conditions: Minimum deposit requirement is £10 to be included for our welcome, deposit and reload bonuses. Maximum bonus available will be communicated in specific promotional offers. UK players only. 35x wager requirement applies. Bonuses have 30 day period until expiry. Further T&Cs apply. 

  • First Deposit: 100%
  • Slot Wagering: 35x
  • Launched: 2013

Never has it been easier to take full advantage of SpinRio's Welcome package of 100 spins + £50 bonus. SpinRio is fully optimised for smartphones and tablets, if players prefer to play on the go, simply load the site up on your browser of choice and choose from hundreds of different games.

Terms & Conditions: New depositing players only.Min. deposit £10. Max. bonus varies per deposit (see below). Bonuses that require a deposit, have to be wagered 35x. This offer is available to players residing in the United Kingdom only. Deposits may be withdrawn before a player’s wagering requirements have been fulfilled. However, if this occurs, all bonuses and winnings will be voided/removed from the player’s account. Players must contact support in order to withdraw their deposit.

  • First Deposit: £50
  • Slot Wagering: -
  • Launched: 2021
3

825 bonus spins 
across your first 5 deposits

18+. New players only.

CasiGO is one of the latest online casinos launched by White Hat Gaming, who are known for creating some of the most immersive online gaming experiences. Join today to claim their newest welcome offer, a massive 825 bonus spins on the popular game Book of Dead, across your first five deposits!

Terms & Conditions: 18+. New players only. One Welcome Package per player. Max Bonus Bet £5. Get 3 Bonus spins for every £1 deposited up to 165 spins for each of your first 5 deposits. Min. deposit is £20. All spins are on Book of Dead only. Bonus funds must be used within 30 days ad bonus spins within 10 days. Spins winnings credited as a bonus and capped at an amount equivalent to the number of spins awarded. Bonus funds seperate to Cash funds, and are subject to 35x wagering and withdrawal requirements. Full T&C's apply.

  • First Deposit: -
  • Slot Wagering: -
  • Launched: 2020

HeySpin Casino showcases some of your favourite slots and games from a number of well-known providers. There's also a tempting welcome offer of 100% up to £25 plus 25 free spins. With so many different games on offer, it’s worth checking out!

Terms & Conditions: Min. deposit: 10£. Max. bonus: 25£. Offer valid on first deposit. Offer only applies to new players. 25 free spins on Starburst (min 20£). Winnings won with games that require deposit, have to be wagered 35x. Bonuses that require deposit, have to be wagered 35x.

  • First Deposit: 100%
  • Slot Wagering: 35x
  • Launched: 2016
5

30 Free Spins
No Deposit!

Over 18s and new players only.

Join one of the most popular Dragonfish slot sites around. Wink Slots has a great selection of popular slot titles; Starburst, Millionaire Genie and Irish Luck. Sign up and deposit using promo code - BIGBONUS and you’ll get a deposit match up to £400 plus 50 free spins. Wink Slots also have a choice of jackpot, instant win and live dealer games for players to try their luck on.

Terms & Conditions: New players only. Max 30 Free Spins [FS} available for 7 days. FS wins granted in bonus after all FS used. FS wins set at £1–£4 (per 10 FS). Bonus wins are capped at £100 exc. jp. wins. To withdraw games bonus & related wins, wager 30x the amount of bonus. Wagering req. vary by game, withdrawal restrictions & further T&Cs apply.

  • First Deposit: 100%
  • Slot Wagering: 30x
  • Launched: 2016
6

£50 Bonus +
50 Free Spins

Over 18s and new players only.

Miami Jackpots's welcome bonus gives new players a welcome bonus consisting of a 100% match up to £50 in bonus funds and 50 free spins on the ever popular slot game, Book of Dead! all you need to do to claim this offer and start playing is deposit a mininum of £10 using the code MJ100. Enjoy slots, roulette or live casino games at Miami Jackpots!

Terms & Conditions: First Deposit Only. Min. deposit: £10, max. Bonus £50. Game: Book of Dead, Spin Value: £0.10. WR of 30x Deposit + Bonus amount and 60x Free Spin winnings amount (only Slots count) within 30 days. Max bet is 10% (min £0.10) of the free spin winnings and bonus amount or £5 (lowest amount applies). Free Spins must be used before deposited funds. First Deposit/Welcome Bonus can only be claimed once every 72 hours across all Casinos. Full T&Cs apply.

  • First Deposit: 100%
  • Slot Wagering: 60x
  • Launched: 2019

MrQ is a brand new one-of-a-kind online bingo site with zero wagering requirements. The site has scoured the world of slots and sifted through hundreds of options to give MrQ players the very best and most popular games, such as Starburst and Swirly Spin! New players can also play 24 hours free bingo when they sign up!

Terms & Conditions: New customers only. Qualifying customers will receive 24 hours access to the ‘Free for All’ bingo room starting at the point of registration. Winnings are not capped and any large wins may be subject to security checks and validation by the game provider. This offer applies to those customers who are the intended recipient of this communication only and on a per customer basis unless otherwise stated. Full T&C's apply.

  • First Deposit: FS10
  • Slot Wagering: 0x
  • Launched: 2018
8

Win up to 500
Free Spins

Over 18s and new players only.

Instantly recongisable by name, one of the most popular and best slot sites around, bgo offers a wide range of slots games, live table games like Blackjack, Hi-Lo, Baccarat, Casino Hold’em, and even Roulette. Sign up to bgo casino and deposit £10 to win up to 500 free spins!

Terms & Conditions: UK only. Win up to 500 Free Spins from Mega Wheel on 1st deposit. 24-hour expiry. Max bet £2.50, max spins win £8 per 10 spins, max Bonus win £150, selected games & 65x wagering on winnings. No Neteller/Skrill. Full T&Cs apply.

  • First Deposit: -
  • Slot Wagering: 65x
  • Launched: 2012

Lottomart is a UK and Gibraltar-licenced lottery website which is dedicated to a mobile audience. Players can earn Diamonds in place of traditional loyalty points and also enjoy a fun range of scratch cards, slots, and live casino games. New players can claim their latest welcome bonus of 100% deposit match + 10% cashback.

Terms and conditions: New players only. Deposit £10 and buy the welcome bundle to receive 100 Free Spins = 25x @ 20p Lara Croft Temples and Tombs free spins. 50x @ 20p Queen of the Crystal Rays free spins. 25x @ 20p Jungle Jim and the Lost Sphinx free spins. No wagering requirements. Full T&Cs apply.

  • First Deposit: 100%
  • Slot Wagering: 50x
  • Launched: 2017

If you’re looking for slots, Videoslots Casino should be your first port of call. One of the top slot sites around, this exciting casino site offers a massive range of slot games from many top software providers, including NetEnt and Microgaming. All the latest releases can be found here, along with hundreds of classic titles and progressives.

Terms & Conditions: New players only. Min deposit £10. Wager requirement 20x. Bonus balance is paid with 10% instalments to account balance. Bonus balance is not payable. Max bet is £20. Account balance is withdrawable at any time. Upon withdrawal, any remaining bonus balance is forfeited. Full terms apply.

  • First Deposit: 100%
  • Slot Wagering: -
  • Launched: 2011
11

50 Free Spins
+ £50 Bonus

Over 18s and new players only.

Will this casino bring you good luck? This casino offers you a fun and exciting play experience, and all the best slot titles you know and love. Why not try you luck at Luckland and take advantage of their £50 and 50 free spins welcome bonus offer?

Terms & Conditions: Terms and Conditions apply. New players only. 18+. Min deposit £20. Welcome package split over 3 deposits 35x wagering applies to match up bonus. 50 Spins on Starburst - 35x wagering applies to Spins. See full terms here.

  • First Deposit: 100%
  • Slot Wagering: 35x
  • Launched: 2015
12

150 Free Spins
+ £150 Bonus

Over 18s and new players only.

New to the market, Play Magical adds a sprinkle of magic to your gameplay! Hosting a huge selection of the best slot games from the top providers, why not see if Play Magical is going to be your new favourite site. New players can claim a £150 welcome bonus and 150 free spins!

Terms & Conditions: First 3 Deposits only. Min deposit £10 1st and 2nd deposit, min £20 3rd. Max cumulative bonus £150 and 150 spins. Bonus match amount varies per deposit. Spins awarded on one of four chosen games. 50x wagering on Deposit + Bonus, 50x on bonus spins. 10x max bonus conversion or £5,000, whichever is lower. £5 max bonus stake. Full T&Cs Apply.

  • First Deposit: 100%
  • Slot Wagering: -
  • Launched: 2019
13

Up to
£300 in bonuses!

Over 18s and new players only.

Sun Vegas is the newest online casino from the same company that bought you the fantastic Sun Bingo, offering a mobile friendly design and a name you can trust. Enjoy live casino games and hundreds of slots with a generous 100% match welcome bonus up to £300! 

Terms & Conditions: 100% bonus up to £300 on your first deposit · New Customers Only · Min Deposit £10 · 50x WR ·  Offer must be accepted within 72 hours. Bonus Valid for 30 Days · Max bet restrictions apply · Bonus can't be withdrawn. Bonus can only be spent on Slot Games · Skrill/Moneybookers and Neteller are not valid for this promo · Real money balance can always be withdrawn.

  • First Deposit: 100%
  • Slot Wagering: -
  • Launched: 2018
14

100 Spins + up
to £50 Bonus

Over 18s and new players only.

Karamba is one of the favourites for online casino and sports betting and their slot selection is equally as impressive! Check out their huge selection of online casino and table games, and even more slot games - all available at the click of a button! Sign up to claim 100 free spins and up to £50 bonus

Terms & Conditions: 18+, Terms and Conditions apply. New players only. 18+. Min deposit £10. Wagering requirement apply 35x. Offer valid for 72hr. 100 spins includes 3 deposit. Full terms and conditions apply.

  • First Deposit: 100%
  • Slot Wagering: 35x
  • Launched: 2005
15
73%
73%

10 Free Spins
+ 100% Match Bonus

Over 18s and new players only.

O’Reels is home to hundreds of slot, casino and jackpot games from the best game suppliers in the industry, so it makes sense it is one of the favourite online slot sites. Join and deposit up to £200 for a 100% welcome bonus plus free spins. Roulette fans can claim up to 15% cashback on losses every single weekend with no wagering requirements.

Terms & Conditions: New Players Only. Wagering occurs from real balance first. 50X wagering the bonus or any winnings generated from free spins. Contribution may vary per game. Available on selected games only. The wagering requirement is calculated on bonus bets only. Bonus is valid for 30 days / Free spins valid for 7 days from issue. Max conversion: 5 times the bonus amount or from free spins: £/$/€20.

  • First Deposit: 100%
  • Slot Wagering: -
  • Launched: 2017
16

25 Free Spins
On Gonzo's Quest

Over 18s and new players only.

Pots of Gold may be a new kid on the block but it's definitely setting itself up as one of the best! With a huge selection of slot games to choose from you'll be wondering how you ever managed without this site. New players can sign up and claim up to £300 bonus and 25 free spins on Gonzo's Quest!

Terms & Conditions: New Players Only. Wagering occurs from real balance first. 50X wagering the bonus or any winnings generated from free spins. Contribution may vary per game. Available on selected games only. The wagering requirement is calculated on bonus bets only. Bonus is valid for 30 days only / Free spins valid for 7 days from issue. Max conversion: 3 times the bonus amount or from free spins: £20. Excluded Skrill deposits. Full Terms apply.

  • First Deposit: -
  • Slot Wagering: -
  • Launched: 2017