Economic Secretary to the Treasury, Chloe Smith, said the freeze on fuel duty announced today would be funded through underspend in Government departments, but would not be drawn on which departments.
She told BBC2's Newsnight:
It is not possible to give you a full breakdown at this point because the figure is evolving somewhat,
More top news
David Cameron has been urged to accept thousands of unaccompanied child refugees from Syria.
The actor and musician, who played character Matt Musgrove on the soaps between 1998 and 2004, has died.
The family of a teenage boy who died after a hit-and-run in Leicester are urging the public to help find the driver of the car.