Career
Fenn competed in many sports as a child but concentrated on cycling from the age of 12 when he joined Welwyn Wheelers. At the 2010, Fenn – who was qualified to ride for Scotland as his mother was Scottish-born – finished 14th in the men"s road time trial. His first year riding as a professional was in 2011, in which he claimed two victories and the bronze medal in the under-23 road race at the Road World Championships.
In September 2014, it was announced that Fenn had signed for Team Sky, joining on 1 January 2015.