Commonwealth Games gold medallist at both Delhi 2010 and Glasgow 2014, Hannah took silver at Gold Coast 2018 for a third straight 400m Individual Medley medal. Hannah first competed for Team Scotland at the 2004 Commonwealth Youth Games, taking silver and two bronze, before going on to compete at Melbourne 2006 where she finished 4th.
A triple Olympian she competed at the Beijing, London and Rio Games, where she finished 6th, 5th and 4th respectively. She has a phenomenal international record and is a multiple medallist at World Championships, European Championships and World Cup events.