London 2012 Olympic Stadium
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How London's 2012 Olympic site unfolded

27 July 2011 Last updated at 07:37 BST

The BBC's Tim Muffett has been given an exclusive tour of the site created for the 2012 Olympic Games being held in London.

Events are being held across the city on Wednesday to mark the start of the Games in one year's time.

The Aquatics Centre in the Olympic Park in Stratford is being unveiled along with the design of the Olympic medals.