James Guy first rose to prominence with a British Age Group record (16 yrs) to win 400m Freestyle bronze on his European Junior Championship debut at the 2012 event in Antwerp.
In 2013, Guy made his mark among the senior ranks, winning two golds, a silver and a bronze at March's British Gas International Meet in Leeds.
Further improvement came at June's British Gas Swimming Championships in Sheffield as Guy landed his first British senior medals, claiming bronze in both the 200m and 400m Freestyle.
After double gold (200m Freestyle, 4x200m Freestyle) at his second European Junior Championships in Poznan, Guy made his senior international debut at the World Championships in Barcelona.
The Brit lowered his British Age Group record (17 yrs) to finish fifth in the 400m Freestyle, then set another British Age Group record (17 yrs) as the lead-off in the 4x200m Freestyle Relay as the British quartet finished seventh.
Guy finished his breakthrough season with three medals at the World Junior Championships in Dubai, landing silver over 200m and 400m Freestyle then anchoring the British quartet to 4x200m Freestyle Relay gold in a Championship record.