Oldham was named as Great Britain's reserve gymnast to participate at the 2010 senior world championships in Rotterdam. He was the youngest member of the British men's team. The British team qualified for the final and finished seventh in the team all-around, although Oldham did not ultimately take part in the competition. In 2011, Oldham was included along with Samuel Hunter, Daniel Purvis, Theo Seager, Louis Smith and Kristian Thomas in the British squad travelling to Berlin, Germany for the 2011 European Artistic Gymnastics Championships from 6 to 10 April, again as the youngest member of the delegation representing Great Britain. Oldham qualified as the second reserve for the parallel bars final and in fourth place for the final on the horizontal bar. He came fourth in the horizontal bar final, which was his first major senior final.