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.

With a game library full of titles from many different providers, an attractive welcome offer and a rewarding VIP scheme, Hello Casino offers everything you'd want from an online slot site. Newly signed-up players can claim a welcome bonus of 100% up to £100 plus 25 bonus spins on their first deposit.

18+. New players only. One bonus offer per player. Min. deposit of £20. Max. bonus bet £5 bonus offer must be used within 30 days and bonus spins within 10 days, otherwise any unused shall be removed. Bonus spins are valid on selected games only. Winnings capped at £50 bonus funds are 100% of your first deposit up to £100, 50% of your second deposit up to £250, 50% of your third deposit up to £150. Bonus funds are separate to cash funds and are subject to 35x wager requirements. Further T&Cs apply.

  • First Deposit: 100%
  • Slot Wagering: 25x
  • Launched: 2014
2

Up to £250 Bonus
+ 100 Free Spins

Over 18s and new players only.

A recent release from respected provider White Hat Gaming, Slotnite is a well-designed site with a range of consistently good games and excellent options for mobile play. New players can take advantage of a generous three-part welcome package of up to £500 plus 200 free spins.

Terms & Conditions: 18+. New players only. One offer per player. Min Dep £10. Max bonus bet £5. 1st Dep offer is 100% up to £250 + 100 Bonus spins on Aloha Cluster Pays. Spins expire after 10 days, funds after 30 days. Bonus funds separate to Cash. Wager Req of 35x Deposit + Bonus apply. Terms Apply. BeGambleAware.org. Full T&Cs Apply.

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

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

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

100% Bonus +
50 Free Spins

Over 18s and new players only.

Voodoo Dreams, a slot site with a distinctive psychedelic theme, is now available in the UK. In addition to slot games from some of the top software providers around, the site offers a range of table games, live casino games and much more besides. New players can take advantage of a welcome bonus of 100% up to £50, plus 50 wager-free spins on the ever-popular Book of Dead.

Terms & Conditions: 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. Full terms and conditions apply.

  • First Deposit: 100%
  • Slot Wagering: -
  • Launched: 2016
6
82%
82%

100% Match Bonus
+ 100 Free Spins

Over 18s and new players only.

With a well-stocked game library and solid range of promotional offers, Mr Play easily lives up to its claim to be "the fun lover's online casino. When they sign up, new players can claim a three-part welcome package spread across three deposits.

100% bonus on your first deposit up to 200£/€/$ unless otherwise stated. This bonus only applies for deposits of 10£/€/$ or higher. Min. deposit: 10£/€/$. Max. bonus: 200£/€/$. Offer valid on first deposit by new players. Winnings and bonuses have to be wagered 35x. Further T&Cs apply.

  • First Deposit: 100%
  • Slot Wagering: 35x
  • Launched: 2017

MrQ is offering new players 30 free spins on their first deposit, with uncapped wins too! Better still, all your winnings are totally wagering free and paid in cash. Sign up and choose from hundreds of casino and slot games at one of the UKs best online slot sites.

Terms & Conditions: First deposit only. Min deposit & spend £10. Max 30 spins on VALHALLA at 25p per spin. Spins credited upon spend of £10. Terms and conditions apply.

  • First Deposit: FS20
  • Slot Wagering: 0x
  • Launched: 2018
8

100% up to £100 +
100 Free Spins

Over 18s and new players only.

Slot game enthusiasts in the UK can now experience this exciting site, which offers plenty of traditional casino games and a unique player vs player mode in addition to a solid range of online slots. New players get a 100% bonus up to £100 along with 100 free spins on the classic Book of Dead.

Terms & Conditions: 18+ new players only. Min deposit: £20. Max £100 bonus. Max bet with active bonus: £2. Wagering required 100% match bonus: 30x deposit + bonus. Max win from welcome bonus: £500. 100 Free Spins are given out 20 per day on Book of Dead for 5 days in a row. Max Free Spins winnings: £100. Free Spins winnings credited as bonus money with 45x wagering & 3 days expiry. Deposit bonus & Free Spins wins are forfeited 30 days after bonus is credited if the wagering is not met. Game weighting and restrictions apply. Full terms and conditions apply.

  • First Deposit: 100%
  • Slot Wagering: -
  • Launched: 2021
9

100 Free Spins

+ bonus up to £200

Over 18s and new players only.

One of the latest sites launched by online casino giant Aspire Global, Queenplay offers a library of over 400 games provided by top developers and an excellent live casino option. New players can claim a three-part bonus package that includes 100 free spins.

Terms & Conditions: Applies only to new depositing players. 18+. Minimum deposit: £10. Welcome Package split over 3 deposits. 35x Wagering requirement applies to match up bonus. 100 spins splits to 20 spins a day for 5 days. Spins credited in specific games. Spins expire after 24 hours. 50x Wagering requirement applies to spins. Terms and Conditions apply.

  • First Deposit: 100%
  • Slot Wagering: -
  • Launched: 2020
10

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
11

£200 Bonus
+ 100 Free Spins

Over 18s and new players only.

A new release from Aspire Global, Regent Play offers a range of slot games, table games and even live casino games. Sign up today and you can claim a three-part welcome bonus including 100 spins across your first five days.

Terms & Conditions: Applies only to new depositing players. 18+. Minimum deposit: £20. Welcome Package split over 3 deposits. 35x Wagering requirement applies to match up bonus. 100 spins splits to 20 spins a day for 5 days. Spins credited in specific games. Spins expire after 24 hours. 50x Wagering requirement applies to spins. Terms and Conditions apply.

  • First Deposit: 100%
  • Slot Wagering: -
  • Launched: 2018
12
Over 18s and new players only.
  • First Deposit: 50%
  • Slot Wagering: 35x
  • Launched: 2009
13

200 Bonus Spins
Welcome Package

18+. New players only.

Slots fans can enjoy a huge library of games to play at Griffon Casino, including hundreds of slot games to choose from. Here players will find classics like Starburst and Book of Dead! Some of the best developers are represented at Griffon Casino with Eyecon, Netent, Blueprint Gaming and Skywind are among them, so you’re sure to find a lot of your favourite slots here. New players can enjoy up to 200 free spins to play across Syarburst, Book of Dead and Fire Joker!

Terms & Conditions: Offer only applies to new depositing players in the United Kingdom. Offer valid on first three deposits. Min. deposit: £20. Wagering requirements on winning from spins: 35x. The 200 Spins are given as follows: 50 spins on Book of Dead upon first deposit (min £20).50 spins on Starburst are given upon second deposit (min £20)100 spins on Fire Joker are given upon third deposit (min £20).

  • First Deposit: FS50
  • Slot Wagering: 35x
  • Launched: 2020
14

£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
16

Win up to 1000%
Match up Bonus

18+. New players only.

Terms & Conditions: 18+. New players only. Minimum deposit £10 to receive a free spins of the 'Bonus Wheel'. £1,000 max bonus, max bonus conversion equal to lifetime deposits (up to £250). 65x wagering requirements and full T&c's apply.

  • First Deposit: 1000%
  • Slot Wagering: 65x
  • Launched: 2017

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

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
19

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
20

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
21

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

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: 50%
  • Slot Wagering: 35x
  • Launched: 2005