The Olympic Stadium's suitability for football after the Games has been questioned by the chairman of one of the clubs bidding to become tenants at the £468million venue.
Leyton Orient chairman Barry Hearn has waged a long campaign for his club to play matches at the stadium after the Olympics - and launched a legal challenge when West Ham were initially chosen ahead of Tottenham.
Hearn told Sky Sports News: "We're looking at it but, I have to say, after my tour of the stadium, I become more and more convinced that this stadium is not fit for football purposes."
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