200% Slots Welcome Bonus Offers

Here is a list of UK casinos offering a 200% slots welcome bonus for new customers. With these UK slot sites you get double your first deposit in bonus funds, giving you more chance to try the games on offer and chase down the wins.

Remember to check the terms and conditions to see what games you can play with your bonus and what terms and conditions apply – including wagering requirements, minimum deposits and maximum bonuses, and expiry terms. You can learn more about these on our UK slot bonus list page.

All casinos listed here are licensed and regulated under UK law by the UK Gambling Commission.

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All Sites are UK Licensed UK
32Red Online Casino

£10 Free - No Deposit Needed

+ Up To £160 1st Deposit Bonus

18+, New Customers Only, Ts and Cs Apply, WR 40x Bonus, winnings withdrawal at any time, BeGambleAware.org

Software : Microgaming
Cash-out time : Up To 24 Hours
Midaur Casino

200% Up To £200 1st Deposit Bonus

+ Up To £1,000 On Your First Five Deposits

18+, New Customers Only, Min Deposit £25, WR 40x Bonus Amount, Ts and Cs Apply, BeGambleAware

Software : Big Time Gaming, Blueprint, NextGen, Aristocrat, Iron Dog, ELK Studios, Lightening Box, Foxium
Cash-out time : Up To 24 Hours
Dunder Casino

20 Free Spins On Starburst - No Deposit

+ Up To £600 Bonuses & 180 More Spins

18+, New Customers Only, Min Deposit: £20, Ts and Cs Apply, WR 25x Bonus + Deposit, WR 25x Free Spins Winnings

Software : Microgaming, NetEnt, Play'n GO, WMS, NextGen Gaming, Quickspin, Yggdrasil Gaming, Thunderkick, Big Time Gaming, Elk Studios
Cash-out time : Within 24 Hours


Our Top Pick – Dunder Casino – 200% Extra With Your  First Deposit

At TheSlotBuzz our favourite new customer offer with a 200% slots bonus is Dunder Online Casino.  At this recommended UK slot site, on the scene since 2015, you get 200% extra up to £50 with your first deposit of £20 or more. This, plus 180 free spins to play on NetEnt’s Starburst slots, and a further 50% up to £150 on your second deposit and 25% up to £400 on your third deposit.

This offer is only available to new customers who are 18 and over – check the Dunder Casino site for full terms and conditions.

Dunder offer over 1,000 slots, table and live dealer games, less than 24 hour withdrawal processing, and a really slick site design. In particular, slots fans will love their easy interface with a smart menu filter system, and a wide range of games. Our favourite suppliers are all on there – check out Big Time Gaming’s top titles like Extra Chilli, Bonanza, White Rabbit and Danger! High Voltage. Plus the latest slot games from Thunderkick, Play n Go, NetEnt, Microgaming and many more can all be played with your 200% slots welcome bonus!

Have fun!



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100% Up To £300
£150 Bonus and 150 Spins
Up To £499 Bonus
100% Up To £500
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100% Up To £200
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