Formula One's boss Bernie Ecclestone has given Donington Park more time to provide the financial guarantees needed to host next year's British Grand Prix.
Ecclestone had initially set an end of September deadline but has twice extended it.
Donington has promised to invest nearly $430 million in revamping the circuit over five years and
chief executive Simon Gillett says they have another two weeks to show they can host the race.
Silverstone hosted the first championship race in 1950 but has now lost the contract after this year's farewell.
Ecclestone says it will host the July 11 grand prix if Donington is not ready although Damon Hill, the president of Silverstone's owners the British Racing Drivers' Club, says a one-year stopgap deal might not be enough.