By Melissa Jones Punters were rueing their luck after a well-supported horse threw victory away by nearly running off the track. Trelawne was backed into 13-8 for the William Hill Towton Novices’ Chase at Wetherby, the biggest test of his short career so far. But the four-time winner from six appearances proved to be a tricky ride for David Bass. While making the running, Trewlane almost galloped off the course after failing to handle a bend at the West Yorkshire venue. Bass could have called it a day, however he kept the faith in his mount’s ability and gave him plenty of encouragement from t…