Kwiff Casino: Best Free Spins Slot Site. Best Features: Over slot games, including more unique slots like Scratch King. Videoslots Casino · 4. Bonanza Megaways. Leo Vegas: Best Mobile Slots Site. Fun Casino · 5. JackpotJoy Casino: Best Progressive Jackpot Slots Site. Magical Vegas Casino: Best Megaways Slot Site. % Bonus up to £50 + Bonus Spins. Top UK casinos for playing slots · Duelz · Mr Vegas · Magic Red · MrQ · VoodooDreams · Luckster Casino · Winomania · Hotstreak Slots. You are. Starburst (NetEnt) · 3. Over Slots; Best Game Providers; Huge Live Casino Section. Immortal Romance (Microgaming) · 4. Best UK Slot Sites · 1. Best Online Casino Site for Slots: Winomania. Play a wide variety of online slots at the best UK slot sites. Discover the Best Online Slots · 1. PlayFrank · 2. All UK Slot Sites () · Bally Casino · Planet Sport Bet Casino · Casushi Casino · [HOST] Casino · Lottoland Casino · BetUK Casino. These generally come from leading software providers, with Starburst, Book of Dead, Gonzo's Quest and Bonanza being among the most popular slots. Mr Vegas. . Casumo · 3. Find your perfect match and win real money at the most trusted slot casinos in the UK. Book of Dead (Play 'n GO) · 2. Find the best UK online casinos with the latest real money slot games, excellent bonuses, online betting, loyalty rewards and more.