Harrison is from
Risca,
Newport. He tried cycling after hearing his friends saying that
Newport Velodrome was fun, and at the age of 13 he was soon racing with the local club,
Cwmcarn Paragon. He was selected to be a member of
British Cycling's Olympic Development Programme in 2008. Harrison was nominated for the BBC's Young Sports Personality award in 2008, after winning three titles in the youth competition of the
British National Track Championships. In February 2009, he was selected to represent Great Britain at the
UCI Cyclo-cross World Championships. He also won two medals at the Under-23
European Track Championships. 2011 saw Harrison break-through at a senior level. He won his first competition at the
UCI Track World Cup event in Beijing, winning the
omnium. The first appearance for Harrison at the
UCI World Track Championships came in
2011, in which he won a bronze medal as part of the
Team Pursuit. He was selected in the final after regular starter
Ed Clancy fell ill. and
2012 Olympic Games after more experienced riders returned to the team. He won the under-23 title at the
British National Time Trial Championships. 2013 saw Harrison return to the British squad for the
World Championships, in which he formed part of the silver medal winning Team Pursuit team. Harrison signed for the team for the 2014 season. Harrison represented
Wales at the Commonwealth Games in
Glasgow, 2014. He was named as a member of the team for the 2016 season. ==Major results==