Katherine Grainger is one of Britain's most decorated athletes, having claimed just about every accolade in world rowing.
However, one prize eludes her - Olympic gold. She struck silver at the last three Games but decided to postpone her retirement to continue the search for the ultimate prize.
Here John Inverdale talks to the 35-year-old about teaming up with Anna Watkins in the double scull and her chances of success at London 2012.
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