There are currently four bidders hoping to take over the venue but West Ham are the favourites.
But at his first meeting chairing the organisation deciding the future of the Olympic Park, the London Mayor told London Tonight that he is not "wedded to football".
Have West Ham's chances of moving into the Olympic Stadium been dealt a blow by Boris Johnson?
The details now from our political correspondent Simon Harris.
More top news
Lord Coe's comments in an exclusive interview with ITV News will dash the hopes of London Tories.
Members of Unite at 18 companies will walk out in February.
Maximum temperature on Thursday of 4C.