Cheltenham Festival bookies were ‘hit for six’ in the very first race on Tuesday when the victory of the favourite cost one firm over £1million. The traditional curtain-raiser, the Sky Bet Supreme Novices’ Hurdle, is one of the biggest betting races of the week with punters. There were a lot highly touted young hurdlers in the field including Old Park Star, Talk The Talk, Mighty Park, Sober Glory and Mydaddypaddy. The Nicky Henderson-trained Old Park Star went off as the 15-8 favourite and