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Jessica Ennis-Hill poses at the ball for Britain's Olympic and Paralympic teams at Battersea Park in London

Jessica Ennis-Hill poses at the ball for Britain's Olympic and Paralympic teams at Battersea Park in London, Britain, November 30, 2016. REUTERS/Hannah McKay

British heptathlon star Jessica Ennis

British track and field star and former World heptathlon champion

Jessica Ennis will be hoping the home advantage can help her win gold in London.