The Best Online Slots UK

Want to know which are the best online slots UK? Check out our extensive article, in-depth and fair slots UK reviews and find out where to play your favourite games for free and for real money (with epic free bonuses)!

Online Casino UK 2021

What Are the Most Popular Slots UK?

There are thousands of online slots UK you can play, one better than the other. UK players really have it great as top software providers from all over the world cater to their needs and frequently create new slots UK for them to enjoy.

We’ve dedicated this page to the best online slots UK and we’ll not only tell you all about them but also make sure that we give you some great examples that you can play right away for free on SlotsCalendar or for real money at the top 20 online casinos UK

When it comes to casino slots UK you will see that you get to play titles from all categories. You can try classic slots, video slots, 3D slots, Megaways slots, branded slots and everything in between. 

Best Payout UK Slots

We’ve compiled a list of the best slots ever made with the biggest RTPs that you can enjoy either as free slots UK or as real money slots. Here are the top 10 best payout slots for UK players:

  • Goblin’s Cave – 99.32% RTP – Goblin’s Cave is a Playtech 3-reel slot game with 3 paylines and a hold feature. It’s interesting that you get to hold some parts of the grid and spin others. While it’s still a game of chance, it has some skill involved which might help you out. 
  • Ugga Bugga – 99.07% RTP – Ugga Bugga is another exciting 3-reel slot game from Playtech. This one also lets you hold and lock in place reels and spin others. 
  • Mega Joker – 99.00% RTP – Mega Joker is a classic NetEnt slot. It’s super old-school and retro with fruit slot machine symbols but it also has modern twists like the Supermeter mode.
  • Jackpot 6000 – 98.90% RTP – Jackpot 6000 is another classic 3-reel retro slot from NetEnt. It’s easy to play and offers big payouts, a Supermeter mode, a gamble feature, as well as a 6000 coin jackpot.
  • Blood Suckers – 98.00% RTP – Blood Sucker from NetEnt is one of the most famous vampire-themed slots ever made. The 25 paylines slot comes with wilds, free spins, and a themed bonus game.
  • Starmania – 97.87% RTP – Starmania is a Nextgen slot that looks and feels like an arcade game. The 5-reel and 10 paylines slot game pays both ways. Special features include free spins, stacked wilds and a gamble option. 
  • Kings of Chicago – 97.8% RTP – King of Chicago is another NetEnt slot, but this one has a 5 x 3 grid.  As it has playing card symbols, you will win by making poker hands on the paylines. 
  • Devil’s Delight – 97.60% RTP – Devil’s Delight is a light-hearted and fun slot game from NetEnt.  You can benefit from the Soul Reaper bonus game, the Sin Spins feature with free spins and expanding symbols. 
  • Couch Potato – 97.43% RTP – Couch Potato is a classic 3-reel slot from Microgaming. The single payline slot is very easy to play. Although it looks super simple and old-school it actually has a 25x multiplier that can get you some serious wins. 
  • Alchemist’s Lab – 97.32% – Alchemist’s Lab is a 3-reel slot from Playtech. Although it has just one payline it can bring you up to 10,000 coins. It also has a pick and win bonus game which is quite unexpected for a classic slot game.

What Makes Our Casino Slots UK So Special?

The first important thing to mention is that we have over 8000 online slots and this number keeps growing with all the new slots UK we add each month. Every category you can think of, every theme, every slot type, all kinds of graphics, bonus features, progressive jackpots, gameplay – we have it.

Sure, we could stop here and you would have enough reasons to try our online slot machines, but this not everything that makes SlotsCalendar slots amazing. 

You can also find online slots UK reviews, in-depth, and legit and with no unnecessary fluff. Just what the slot game offers and how to play it. Also, play for fun versions. You can play each one of them for free in demo mode for as long as you want on our website. 

And for the grand finale – while other affiliate websites will give you random bonuses next to games, we make sure to tailor your casino experience from beginning to end. Under every single game you will find a bunch of bonuses, most of which will work on that exact same game. 

Some will also work for that entire software provider’s collection. You will find casino bonuses of all kinds from no deposit free spins and no deposit free cash to welcome bonuses and other epic options.

Where can I play the Best Online Slots UK?

The United Kingdom is the highest regulated market of all of them thanks to the UK Gambling Commission. This means that all legal and licensed online casino sites from the UK are safe and fair. 

So as long as you pick a casino that’s licensed and regulated by the UKGC you can play all the online slots real money you want and you will be perfectly safe. 

You can pick live dealer casinos, the best slot sites, fast withdrawal casinos, online casinos with high stakes or low stakes, whichever you prefer, as all the sites we recommend are worth checking out. 

Everything You Need to Know About Free Slots UK

On SlotsCalendar you can play online slots UK for free in demo mode for as long as you want with no deposit and no download required. 

All online slots UK new titles you can think of, the top 10 online slots UK and thousands of others, everything you would ever want to play is available on our website.

Check all our neatly divided categories to find your favourite games. As soon as you open an individual game page you will see the free online slots demo and after you’ve signed up or signed in you can play the game for free. 

On the right side, you will see a table that tells you all you need to know about the game. And below the play for fun version of the game, you will see a full review that tells you how to play the game to have the best chances of winning. You will also find the bonuses that can help you enjoy the slot machines you’re interested in. 

What you need to know about playing top online casino slots UK for free is available on the page, in the review. We add new slot games every month, even before they are officially launched. You can play all of them for free, on any device you prefer, even as a mobile slot game on tablets and smartphones that run on Android or iOS. 

What Online Slot Machines Can I Play at

Basically, all the free demo slots games online ever made. If they are worth playing, then we surely have them. New, popular, with bonus features, classic games, every type from Microgaming, from NetEnt, from over 200 of the most well-known software providers. 

Among the many epic titles, you can try on SlotsCalendar, you’ll also find the most popular slot games ever made: 

Play New Slots UK at

If you go on our homepage you will surely notice the calendar. We’re not called SlotsCalendar randomly 😂.

The calendar will tell you when new slots will be launched (or were launched, but that’s not as important). You get to see them a long time before they’re launched and even test them for free to see what the max win is, potentially, how the features work, if the gameplay is fun etc. 

Every new online slot is going to be there and you can put it in your calendar to get notified when it’s live and ready to go so that you can play it at a mobile casino for real money and even using great slot site offers. 

Can I Play Real Money Slots at

If you’ve used our calendar of online slots UK and have seen when games you’re interested in will be launched and that day has finally come, then it’s time to play it for real money. You can easily do this. 

Each of the games has the tailored bonuses we’ve discussed earlier that fit the game, but you can also check out other hundreds of top UK online casinos and play real money slots, with some exciting bonuses.

Frequently Asked Questions

  • On what online slots can you win real money?

    Online slots can either be free-play or real money. If you’re playing for free then you can’t win real money, but if you’re playing for real money (with or without bonuses) you can win. Sure, it’s all up to how lucky you are, but you have great chances of winning.

  • What is the best time to play online slots?

    Whenever you want to in your free time. Some say that the beginning of the month is better, others that the end, some prefer Tuesdays, others the weekend. Some feel luckier and night, others in the morning. There is no 100% accurate answer – whenever you can afford it, feel like it and think you’re lucky.

  • What are the best free online slots?

    Starburst, Book of Ra, Book of Dead, Mega Moolah and Bonanza are just some of the most popular slots you can play for free on SlotsCalendar. Players’ have different tastes and preferences, but most of them agree that these are the must-play titles.

  • Where can I play online slots?

    On SlotsCalendar. We have all the online slots, both new and popular, you could ever want. You can play them for free in demo mode or find a great casino and play them for real money.