Britain will allow two notorious members of the "Beatles" group of Isis militants to be sent to the US, the Daily Telegraph reports.
The UK has abandoned its "blanket" opposition to the death penalty and Guantanamo Bay, the newspaper says.
The Daily Telegraph reports that documents show that the Government has agreed to hand over intelligence to help prosecute Alexanda Kotey and Shafee El-Sheikh in US courts.
The men both held British citizenship, though the newspaper says it has been reported that this has been secretly revoked by ministers.
Britain's Home Secretary Sajid Javid tells US Attorney-General Jeff Sessions in a letter that Britain will not demand "assurances" that the pair will not be executed in the US.