Financial guarantees of up to £410m have been offered while talks on longer-term restructuring get underway.
But British Energy warned: ‘There can be no certainty that this will preserve value for investors.’
The company told ministers last week it needed a cash injection of at least £280m to enable it to refinance borrowings, £100m more than the company had previously said it needed.
Reports suggest chief executive Robin Jeffrey was not fully informed about the generator’s financial position last month when he told analysts the company was not facing a crisis.
The Financial Services Authority is investigating whether the company has been sufficiently open about its problems, focusing on reassurances given by Jeffrey and Keith Lough, finance director, during an 14 August telephone conference.
Political and economic uncertainty behind the fall in confidence
Just Racing Services, operating company of the Manor Racing Formula One team has entered administration
Last year 16 oil and gas companies became insolvent, finds Top Ten firm Moore Stephens
Team Rock the publication of classic rock is in administration with FRP Advisory