By Martyn Herman LONDON (Reuters) - Britain's track cycling golden girl Laura Kenny says drastic changes to the omnium event she has owned at the past two Olympics have left her scratching her head. A few weeks after marrying six-times Olympic track champion Jason Kenny in September, cycling's governing body the UCI axed the pursuit, flying lap and time trial from the omnium and introduced a 7.5km "tempo race". Although Kenny welcomes change if it helps makes the omnium more TV friendly, she admits being clueless about the tempo race she was set to ride on Saturday. More...