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Sky Vegas also have one of the biggest welcome offers available for those seeking free spins on registration, with a total of 250 free spins available to new customers. Sky Vegas has a relatively small library of slot games, compared to some rivals, but it regularly updates its selection with the latest big releases and some exclusive titles. During my reviews, I found MrQ to be one of the most transparent slot sites in the UK, leaving no stone unturned when it comes to their explanations of games and offers. Slots fanatics will know the difference between regular slot games and Megaways, but for those keen to explore the slot spin-off, MrQ is the best slot site to learn all about them. Betfair are one of the biggest gambling sites in the UK and as you would expect, they run a slick operation with fast loading times, quick payments and a good selection of quality games. It would be nice to see a few more offers added to the promotions page with the Pinball Prize machine KSI casino app the only option for those seeking to unlock some free spins.

Next up on our list of the Best Slot Sites UK is Betfred. Up to 140 Free Spins (20/day for 7 consecutive days on selected games). Claim within 7 days. Credited within 48 hours and valid for 7 days.

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There are three levels to the club, each with its own allocation of free spins, starting with a bet £20, get 10 free spins deal and going up to bet £200, get 60 free spins. They’ve quickly established a strong core of users, who are treated to a top-class app, regular rewards on both the sportsbook and slot site, and speedy payments. Each operator is evaluated on its safer gambling measures, including deposit limits, time controls and self-exclusion options. I double-check licence details and look for signs of additional regulatory oversight, such as membership with IBAS (Independent Betting Adjudication Service) or partnerships with testing agencies like eCOGRA. Unique promotions that are in the interests of existing players, such as free spins for adding a card to your account, did not go unnoticed.