Welsh swimmer Thomas Haffield broke through in 2005, winning his first British medal with 400m Individual Medley bronze then landing the same result on his European Junior Championship debut in Budapest.
The following season, he made his Commonwealth debut, reaching the 400m IM final and finishing sixth in Melbourne.
Haffield won his first British title with 400m IM gold in 2008 and made his Olympic debut four months later, finishing 17th in the same event at Beijing 2008.
In 2009, he defended his British title before reaching the 400m IM final on his World Championship debut, finishing seventh in Rome.
Haffield made his second Commonwealth appearance at Delhi in 2010, finishing less than a second off the podium in fourth in the 400m IM.