The future of the Olympic Stadium may not be resolved by the original deadline of the end of the month, reports the Guardian.
West Ham United are keen to become the main tenants of the stadium in time for the start of the 2014-15 season but are embroiled in tense negotiations with the London Legacy Development Corporation about modifications to be made to the stadium at a cost of up to £160m and who will pay for them.
The LLDC chief executive, Dennis Hone, told the Guardian that talks were entering the "end game" ahead of a crucial board meeting next week, but said there was no "knockout" bid and the arguments for and against football and the changes demanded by West Ham remained finely balanced.
"If we can't come to a conclusion, in the scheme of things if it slips another month or two I'd rather get the right solution," Hone said.
"Yes, the stadium is tricky. But it's tricky because we want to get it right. I would hate to bung someone in there and see it fall apart in five years. If it takes a couple of extra months to get there, then so be it."
The other bids under consideration, which could be incorporated alongside the Hammers rather than instead of them, are from Leyton Orient, a consortium wanting to hold Formula One racing in the Park – though that is unlikely – and a football business college.