racenet.com.au. Reigning Melbourne Cup-winning jockey Jamie Melham is sweating on a start in Australia’s greatest race. Melham, who completed a historic Cups double last year aboard Half Yours, has picked up. Jamie Melham: hoping to ride first winner at Ascot -Credit:Vince Caligiuri, Getty Images Jamie Melham has already secured her spot in racing folklore but admits she is "dying to ride a winner at.