Sports fans are being given the chance to get back into the Olympic Park before it reopens to the public in July.
Tickets are being offered for tours of the site in Stratford, between March 29 and May 6, as it is redeveloped into the Queen Elizabeth Park.
The park has been closed since the 2012 Games ended last September.
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The Football Association has announced it has received an offer to buy Wembley Stadium.
The most hotly-tipped date is July 13, following the Nato summit which the president is due to attend in Brussels on the previous days.
Abbas Edalat, a professor in computer science and maths at Imperial College London, has reportedly been held in custody since April 15.