There isn't a single 'best' UK betting site as they all have their own pros and cons and all target different segments of the online betting sector. Generally speaking, Bet365, Betfair, Paddy Power and SkyBet are seen as the 'Tier 1' sites by size and betting revenue, but that doesn't mean they will automatically be the right site for you. Our advice would be to navigate around Playright until you find the subject that most interests you e.g football betting, esports betting, betting apps and then refer to the recommended sites list on that particular page.