Patten was a late developer in swimming. She won her first national medal, a bronze, in 2003 aged 16, in the 200m butterfly. Also in 2003, she first represented Great Britain at the European Championships in Dublin. The next year was her most successful in her youth career. At the 2004 Youth National championships, she won four golds (100m and 200m butterfly, 400m and 800m freestyle) as well as two silver (200 freestyle and 400 individual medley). She also qualified for the World short course Championships in Indianapolis, where she came 4th in the 800m freestyle. At the British Championships in 2006, she won a bronze in the 400m and a silver in the 800m. At the British Championships in 200, she won a bronze in the 400m freestyle and a silver in the 200m butterfly. In her third year at the championships, which doubled as the 2008 Olympic trials, she won silver in the 800m freestyle and qualified to represent Team GB in this event. Her open water career started in 2006 when she competed in several world and European Cup events. In her first year open water swimming, she was the overall best female in Europe and took home the LEN cup. She won a silver medal in the 10 km freestyle at the 2007 World championship, only three seconds behind
Larisa Ilchenko, the gold medallist. Patten represented
Great Britain at the 2008 Summer Olympics in the 800m freestyle and also in the 10 km open water swimming event, where she won a bronze medal. Her international swimming career lasted eight years and she competed in one Olympics, eight World championship events and ten European Championship events. == Post swimming career ==