Brexit secretary David Davis has threatened to quit if cabinet colleague Damian Green is fired over allegations of porn use.

The Evening Standard revealed that Davis was forced to "put his cloak around" Green in a bid to defend him.

It comes amid new revelations by a former Scotland Yard detective who said that there were "thousands" of pornographic images on Green's computer.

The Stndard revealed that a friend of Davis and Green said that "David would find it quite difficult to stay in his job and not resign if Damian was pushed out because of anything related to what happened 10 years ago."

This warning has reportedly been sent to Theresa May, who has sought to defend her deputy amid the row over material on his laptop.

Former Scotland Yard detective Neil Lewis has said there is "no doubt whatsoever" that it was Green who was viewing the pornography at his computer when he was an opposition immigration spokesperson at the time.

Lewis said: "The computer was in Mr Green's office, on his desk, logged in, his account, his name.

"In between browsing pornography, he was sending emails from his account, his personal account, reading documents... it was ridiculous to suggest anybody else could have done it."

Green is currently at the centre of a separate cabinet investigation over allegations that he acted inappropriately towards write Kate Maltby.

His spokesman said: "It would be inappropriate for Mr Green to comment on these allegations while the Cabinet Office investigation is ongoing.

However, from the outset he has been very clear that he never watched or downloaded pornography on the computers seized from his office.

He maintains his innocence of these charges and awaits the outcome of the investigation."