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Labour's Jess Philips issued a risque slapdown to Tory David Davis over his defence of Theresa May's deputy, Damian Green.

It follows reports that the Brexit Secretary has threatened to resign from the government in solidarity if Green is forced out over claims he watched porn at work.

It follows claims from an ex-Met detective that 'thousands' of legal porn images were found a computer in Green's parliamentary office following a police raid in 2008.

Mr Green denies ever having viewed pornography on his office computer.

An investigation into Mr Green's conduct, including allegations of inappropriate behaviour with a Tory academic and activist, is not expected to be published today.

According to the Evening Standard, a mutual friend of Mr Davis and Mr Green said: "David would find it quite hard to stay in his job and not resign if Damian was pushed out because of anything related to what happened 10 years ago."

(Image: AFP) (Image: PA)

They also said the warning had been given to Theresa May "in words of one syllable."

Jess Philips issued a withering put-down on Twitter after the quotes emerged.

She wrote: "David Davis your red line, your hill to die on is really something.

""What made you want to become an MP?" "Great question, I really wanted to fight hard so people can w**k at work""

Neil Lewis, a former computer forensics officer, said this morning that he was was “shocked” by the volume of explicit images on Mr Green’s machine.

And now the Metropolitan Police is examining Mr Lewis over claims he disclosed confidential information about Mr Green which he'd obtained during the 2008 inquiry into Home Office leaks.

He told the BBC there were “thousands” of pornographic thumbnails on the computer, indicating it had been used to viewed legal material “extensively”.

Mr Lewis told the BBC he was involved in analysing the then opposition immigration spokesman's computer during a police investigation into Home Office leaks.

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He stressed that none of the images were "extreme", but said analysis of the computer suggested they had been viewed "extensively" over a three-month period, sometimes for hours at a time.

A spokesman for the First Secretary of State 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."

But friends of Mr Green told the Press Association they were "gobsmacked" and found it "deeply concerning that a former police officer who freely admits talking to Bob Quick is putting confidential and non-illegal details of a police investigation into the public domain and equally outraged that the BBC would use such information from an unreliable source".