'A government in chaos' - Boris Johnson 'running out of friends' as his Brexit minister resigns

In Northern Ireland, DUP leader Jeffrey Donaldson said Frost’s departure was a bad sign for Mr Johnson’s commitment to removing the Irish Sea border.

David Frost looks on as UK Prime Minister Boris Johnson signs the EU-UK Trade and Cooperation Agreement. Picture: Leon Neal/PA

Boris Johnson has been warned by a prominent Tory MP that he is running out of time and friends to help deliver on his promises, as the Mail on Sunday reported Brexit minister David Frost had resigned.

Mr Frost, who has led negotiations with the EU, is reported to have handed in his resignation letter to Boris Johnson last week.