Over £16 billion is gambled each year in the UK across a variety of platforms, with wagering available on everything from lotteries, sports betting, online casinos, bingo, and more.The UK market has exploded, and for those interested in having a flutter on betting sites or spinning the wheels on a roulette table, there’s now a huge amount of choice. We’ve put together a guide to help punters find the best gambling sites, no matter their preference, reviewing our favourite gambling spots.Gambling siteBest forWelcome offerThe Vic CasinoOnline rouletteDeposit £20, play with £40MrQSlots200 no-wagering free spinsGrosvenor PokerPlay with £40 when you deposit £20LadbrokesBlackjackBet £10, get a £30 casino bonusBuzz BingoBingoDeposit £10, Get £40 in Bingo Bonuses or 200 free spinsBetMGMGambling app£50 welcome bonus & 125 free spinsBet365Football bettingBet £10, get £30 in free betsBOYLE SportsHorse racing bettingBet £10, get £40 in free betsOur reviews of established online gambling platforms and new casino sites are based on a wide-ranging set of criteria, with operators having to hit all the points on our checklist.Licensing – We only recommend gambling sites licensed by the UK Gambling Commission (UKGC), ensuring they comply with UK regulations and laws to promote security and fair play online.Welcome bonus – It’s important that gambling sites provide good value and fair terms with their welcome offers.Markets/Games – Variety is the spice of life and whether punters are betting on sport or playing at casino sites, they want plenty of choice when it comes to games and markets.Promotions – The best gambling sites will do their utmost to ensure existing customers receive regular promotions and casino bonuses. These can include free bets, free spins, and price boosts on sports and casino markets.Mobile – Betting or casino apps should have good functionality across both Apple and Android devices, ensuring that users of all devices can access a complete mobile offering.Payment methods – Gambling sites should offer a range of secure, accessible payment methods to make it simple for customers to make a deposit or withdrawal. A fast withdrawal casino or bookmaker earns extra marks for giving bettors easy access to their funds when they need them.Security – The best gambling sites will offer a range of security measures to protect user data, including the latest encryption technology and two-factor authentication. Customer support – Top UK gambling sites set themselves apart by offering great customer service and support. Below, we’ve broken down the best gambling sites on the market according to different categories.Best gambling website for rouletteCoralWe like the value for money that comes from being a Coral customer, with the well-established operator standing out among roulette sites in particular. The Coral live casino has a great selection of roulette titles, while the more standard casino site features a large number of exclusive roulette games that can’t be found elsewhere. Playing roulette at the live casino means bettors are eligible for a range of live casino promotions, while Coral have a massive selection of free-to-play games, offering various rewards, including free spins and cash prizes.Top gambling site for slotsMrQMrQ is one of the most trusted gambling sites, earning plaudits for the way it clearly displays the odds of winning on any casino game and its selection of easy-to-understand offers.They stand out from other slot sites for a variety of reasons, starting with the sign up offer, which includes 200 no wagering free spins.MrQ has been recognised as one of the top slot spots by the industry, winning the EGR Slot Operator of the Year award and its library features over 900 titles, covering a huge variety of slot types.We also like MrQ’s pledge to complete all payments instantly - once bettors have ticked off all the Know Your Customer (KYC) check - with the gambling site giving bettors £10 in credit if payments are delayed.Best gambling site for pokerGrosvenor CasinoGrosvenor has made a successful transition from being just a bricks-and-mortar casino franchise to an online gambling site catering to a variety of users and should appeal to fans of poker sites.There’s a dedicated poker promotions page, stuffed full of offers, such as a loyalty scheme, while it's also where players can find all the details on the various poker competitions run by Grosvenor featuring cash prizes.At the time of conducting our review, Grosvenor were running daily poker offers, which could be completed by playing in one of their many live poker rooms.Gambling site for blackjackLadbrokes CasinoLadbrokes has a huge range of offers on both its sportsbook and online casino, catering to all types of gamblers. It could have filled a couple of positions on this list, but it gets the vote as one of the best blackjack sites, largely because it's one of a handful of gambling sites with a blackjack-specific offer.It does the basics well with over 65 different blackjack options spread across its virtual and live casino sites. By playing live blackjack, bettors are in with a chance of revealing one of Ladbrokes’ Lucky Cards, granting punters either a £5 free sports bet or £5 in cash.Bettors could win up to three Lucky Cards per day when playing blackjack, while they can also earn live casino bonuses via other promotions, which can be used to wager at their chosen blackjack table.Best online bingo gambling siteBuzz Bingo Buzz is only six years old but is already one of the best bingo sites in the UK, with a good range of bingo games available online including 90, 80 and 75-ball bingo. It is one of the more innovative bingo sites around, particularly when it comes to live games. It has one of the top welcome bonuses on the market, giving users a choice between either a £40 bonus bingo or 200 free spins on its slot games once customers have staked £10 online.Best app for gamblingBetMGMBetMGM is one of the best new gambling sites in the UK and has hit the ground running thanks in part to having one of the best betting apps. BetMGM knows the value of mobile wagering, and have optimised the functionality across both Apple and Android devicesThe app scores a 4.5 out of 5 rating on the App Store and a 4.3 on the Play Store from users, way above most betting apps.The US gambling sites giant has done a great job integrating the sportsbook and online casino into a single app and for bettors who like to flick between both, the BetMGM app is tough to beat for functionality and speed.Depending on whether you’d rather have a sportsbook or casino welcome bonus, BetMGM give bettors the option to enjoy a bet £10, get £40 in free bets offer for sports or claim 200 free spins for the online casino.Best mobile gambling siteDuelzDuelz is a mobile-optimised casino, meaning those using the site on their phone or tablet, rather than desktop, will see the best version of the gambling site. Their commitment to mobile gaming includes being one of a handful of pay by mobile casino operators, meaning punters can make deposits which are added on to their phone bill. Duelz also offer weekly cashback and regular slot tournaments to enjoy once you’ve played through the welcome bonus.Best gambling site for footballBet365Bet365 is the gold standard for football betting sites. It covers almost every major league across the world, offering an array of markets and (often) the best odds across the board.The Bet365 bonus code will unlock a bet £10 get £30 free bet welcome offer for new customers, while existing users can expect regular bet boosts, profit boosts and acca bonuses along with access to free games. Live streaming is also available on major European league such as LaLiga and the Bundesliga.Gambling sites for horse racingBOYLE SportsBOYLE Sports has a well-earned reputation as one of the best horse racing betting sites in the UK thanks to its competitive odds and excellent selection of offers, including money-back offers, extra place races, the best prices on UK and Irish races and a selection of accumulator betting offers such as Acca Rewards and Acca Loyalty. They also tend to have one of the best selections of Cheltenham free bets when the annual festival rolls around. Gambling can be addictive, so it’s important to pause and think before you bet. Never gamble more than you can comfortably afford to lose, and avoid chasing losses as this is where most players run into trouble.Responsible gambling is essential. While UK-licensed operators must follow strict UKGC rules to keep players safe, bettors also have a responsibility to manage their own behaviour and spending.The safest way to enjoy gambling sites is to set limits, stay aware of your habits, and recognise when your play stops being fun. Operators provide the tools, but you must decide when to use them.It’s particularly important not to get carried away by casino offers or free bet offers, both of which are available in abundance on gambling sites, but must be approached with caution.In the UK, there are a number of gambling addiction charities ready and prepared to help you with counselling, support groups and practical advice on how to help you recover if you do lose control:Gamblers Anonymous NHS GamCare GambleAwareWe may earn commission from some of the links in this article, but we never allow this to influence our content. This revenue helps to fund journalism across The Independent.