Reports claim that Olympic Park Legacy Company executives have decided that West Ham’s proposals to retain the running track and modify the stadium have edged ahead of Tottenham’s plan to build a new ground.
An official announcement by the OPLC board is expected tomorrow.
West Ham’s plans for the stadium will include £90m of conversion work to include more corporate hospitality and make the ground suitable for football.
Spurs’ plans would have retained 80% of the stadium while dismantling £80m of Sir Robert McAlpine’s work – including the athletics track.
The North London club also planned to boost the capacity of Crystal Palace Athletics Stadium to 25,000 in return for removing the running track at the Olympic Stadium.
An OPLC spokesman said: “It is pure speculation to say that a decision has been made.
“Our board meets on Friday. There will be presentations by OPLC officers of both bids and a vote to recommend a preferred bidder.”