He tried cycling after hearing his friends saying that Newport Velodrome was fun, and at the age of 13[4] he was soon racing with the local club, Cwmcarn Paragon.

[5] 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.

[8] 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.[3] Harrison also finished 11th in the omnium.

They were valued at approximately £12,000 and included a bright pink Planet-X team issue bike unavailable in the shops.