Born in Wolverhampton, West Midlands, UK, Tennant began to make his mark on the cycling world as a junior rider.

[5] In 2005 he was selected for British Cycling's Olympic Development Programme and lived in Tuscany, Italy with the GB squad in 2006.

[6] Tennant represented England in the points race at the 2006 Commonwealth Games and represented Great Britain in the Under-23 road race at the 2006 UCI Road World Championships in Salzburg, Austria.

[8] Whilst riding for Team Halfords Bikehut in 2009, he was mentored by Rob Hayles.

[9] In 2015 Tennant moved to the new WIGGINS team set up by Bradley Wiggins aiming to prepare British riders for the team pursuit at the 2016 Summer Olympics.