The Conservative Party’s chief whip is investigating reports that a Tory MP watched pornography on his phone in the Commons chamber.

The party’s whips office said “the chief whip is looking into this matter” in a statement released on Wednesday.

“This behaviour is wholly unacceptable and action will be taken.”

It is believed the accusation was made during a meeting of the 2022 yesterday – the female grouping of the 1922 group of Conservative backbench MPs.

Around 50 to 60 female Conservative MPs are said to have been present at the meeting.

Sky News understands that two individuals in attendance told Chief Whip Chris Heaton-Harris how they had witnessed an MP watching pornography both in the chamber and in a committee.

It comes in response to reports in The Sun and Daily Mirror that the MP – reported to be a Tory frontbencher – was watching pornography on a mobile phone while sitting alongside a female minister.

One MP in attendance told Sky News that Mr Heaton-Harris looked “horrified” and asked for the man’s identity.

According to Sky News’ political editor Beth Rigby, the women have subsequently spoken to the chief whip and named the man.