After reaching the European Junior Championship 200m Breaststroke final in 2008, Andrew Willis broke through into the senior ranks in 2010 to finish fourth in the same event at the Commonwealth Games in Delhi.
He made rapid progress on his return from Delhi, lowering his personal best en route to a final appearance in the 200m Breaststroke on his World Championship debut in Shanghai in 2011.
He lifted his first British Champs title in 2012, winning the 200m Breaststroke title ahead of teammate and training partner Michael Jamieson to book his spot at his first Olympic Games, then qualified for the Olympic final before ultimately finishing eighth.
After a fifth place at the 2012 World Short Course Championships, Willis was just 0.18 seconds off the podium at the 2013 World Championships, finishing fourth in the 200m Breast final.
He landed his first senior international medal in 2014, winning 200m Breaststroke bronze for England at the Glasgow 2014 Commonwealth Games, before finishing fourth in the same event at the European Championships in Berlin the following month.