The new plans would be an escape route for the Football Association (FA) if the proposals for a new £715million ($1bn/EUR1.1bn) stadium are scrapped.
Nic Coward, company secretary of the FA said there was a "staging agreement" which meant Wembley would be reopened in its current form to stage cup final matches and other major events in order to raise money to pay back a £120m ($175m/EUR189m) lottery grant.
Culture Secretary Tessa Jowell will tomorrow give MPs an update on Wembley National Stadium Limited's attempts to secure private funding of the new stadium from German bank WestLB.
