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Team GB won four golds in the Olympic Stadium at London 2012, but who are the prospects to repeat that feat in Rio de Janeiro in 2016?

The Olympic gold and silver medallist Darren Campbell has spoken to Britain's Adam Gemili, who burst on to the international scene last year with his performances over 100 metres.

How does Gemili now make the step up to challenge Usain Bolt? And will the likes of Katarina Johnson-Thompson, Andrew Pozzi and Lawrence Okoye be among the next superstars of British Athletics?