In 2015 he won his first major international title, gold in the floor exercise at the 2015 European Artistic Gymnastics Championships.

[3] In 2006, Thomas attended the Commonwealth Games in Melbourne, Australia, where he placed 12th and helped the English gymnastics team win the bronze medal.

[6][7] At the London Olympics, Thomas was part of the bronze medal-winning GB men's team, competing on 30 July 2012 at the North Greenwich Arena .

In event finals, Thomas won the bronze medal in high bar (14.808) behind teammate Sam Oldham.

[9] In July and August, at the 2014 Commonwealth Games held in Glasgow, Thomas contributed a score of 58.599 for the England team and won gold.