Tory MPs have called on the prime minister to commit to the northern leg of HS2, after ministers refused to confirm that the rail link will ever reach Manchester.
Facing a series of questions in the Commons, Richard Holden, the transport minister, declined to dispute claims that Rishi Sunak was on the verge of curtailing the project.
The intervention comes as Sunak and Jeremy Hunt, the chancellor, are locked in talks over how to cut spiralling costs on the troubled scheme.