Britain’s number one female rider Laura Renwick raced to victory today in the Sky Sports Speed Classic, finishing more than 2sec clear of her nearest rival.   Her mare Beluga swept round Kelvin Bywater’s 1.45m course, and though last-drawn Guy Williams looked to be fast, he wasn’t quick enough and had to settle for second place with Bijou van de Vijfheide. Rather aptly for Ladies’ Day, all of the top four horses in this class were mares.