[9] At the 2012 Summer Olympics, he competed in the men's 100-metre breaststroke, finishing in sixth place in the second semifinal, failing to reach the final.

[10] Benson, won a bronze medal at the 2012 European Junior Swimming Championships in Antwerp, Belgium, 0.04 of a second behind the winner, Olympic swimmer Dănilă Artiomov.

[2] He also swam in the 2012 European Short Course Swimming Championships in Chartres, France, and was part of the medley relay squad that broke the British record.

He won a silver at the 200m Breaststroke at the 2016 FINA Swimming World Cup meet held in Dubai.

[20] He confirmed his retirement at the 2022 Commonwealth Games in Birmingham, earning a bronze medal from swimming the heats of the men's 4 × 100 m medley relay.