 Complete the following phrase:  His first experiences of track and field competition were as a junior high jumper and John Anderson, the referee for the UK television series Gladiators and coach of former world record holder Dave Moorcroft, urged him to focus on athletics. Training at Corby Athletics Club, he began competing in the decathlon and 110 metres hurdles and he became the No. 1 ranked under-20 British athlete in both disciplines. At the Amateur Athletic Association AAA under-20s championships in 2003, he won the decathlon. His first major junior competition was the 