Calum is an Olympic weightlifter competing in the 77 and 85kg weight classes. Having previously trained as a gymnast, he transferred to weightlifting in 2013, rising through the country's rankings to a top-ten spot in both classes. In the summer of 2014, he was one of only three British athletes selected to train amongst the Chinese national team in Beijing, learning from the best lifters in the world. He is currently coached by Commonwealth Games gold-medallist Giles Greenwood, and hopes to represent Great Britain at future international competitions.