At the 2012 Summer Olympics, in partnership with Heather Stanning, she set the Olympic record and won the gold medal in the women's coxless pairs, the inaugural gold medal won by Team GB in 2012 and the first Olympic gold medal for British women's rowing. In December 2012 she won the BBC "Olympic Superstars" game show. At the 2013 World Rowing Championships in South Korea, she became the world champion with her partner Polly Swann, with whom she also won the 2014 European Rowing Championships at Belgrade and thus became the first woman to hold the Olympic, World and European titles for the coxless pair. She retained her world title and set the world record time in partnership with Heather Stanning at the 2014 World Rowing Championships in Amsterdam. They retained their world title at the 2015 World Rowing Championships in Lac d'Aiguebelette, France. In 2016, they retained their European title at Brandenburg an der Havel, set the World Rowing Cup record time at Poznan and again won gold at the Olympics in Rio de Janeiro. She retired after the Olympics to begin a family.