More Lucky 15 tips today to add to your horse racing bet slips on Thursday 21st July, as Paul Kelly gives you his four best bets from across the UK and Ireland horse racing meetings today at Sandown, Worcester and Leopardstown respectively. Best Horse Racing Betting Offers & Free Bets Already claimed these betting offers? You can check out the best horse racing betting sites and add more top bookmakers to your portfolio. Back today’s Lucky 15 tips in an acca @ 350/1 with Bet UK (click the betslip below). Plus, why not work out what today’s picks could win by using our Lucky 15 bet calculator for free? Here are our four best horse racing tips to include in your Lucky 15 bet slip, plus join the Bet UK ‘Acca Club’ and get 5 profit boosts to use on accas with different numbers of selection...