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John Inverdale introduces coverage from the final day of the World Rowing Championships, which are taking place on Lake Aiguebelette in south-eastern France. At stake are not only medals and titles but also opportunities to qualify boats for the 2016 Olympic Games. Great Britain won four golds at 2015's event in the Netherlands, including in the men's eight, which will be the final race of the regatta. Meanwhile, 39-year-old Katherine Grainger, who memorably won gold at London 2012, will be hunting for another title in the women's double sculls, as she takes another step towards defending her Olympic title in Rio. Expert analysis comes from Sir Steve Redgrave and Anna Watkins, while the race commentators are Garry Herbert and James Cracknell.