Boris Johnson is under growing pressure over his decision to give Chris Pincher a ministerial role and the delay in removing the Tory whip after groping allegations emerged.

One of the MP for Tamworth’s latest accusers has said he was “shell-shocked” by the decision not to immediately kick Mr Pincher out of the parliamentary party.

Mr Pincher quit as Conservative deputy chief whip after he was accused of drunkenly groping two men at a private members’ club in London this week.

The Prime Minister only bowed to pressure to remove the whip from his ally, meaning he is now sitting in the Commons as an independent, after an official investigation was launched.

Boris Johnson is under growing pressure over his in removing the Tory whip from Chris Pincher MP after groping allegations emerged. (PA)

Mr Johnson was also facing questions over how much he knew about Mr Pincher’s behaviour when he made him deputy chief whip in February.

Former adviser Dominic Cummings said the Prime Minister had referred to the MP “laughingly in No 10 as ‘Pincher by name, pincher by nature’ long before appointing him”.

Fresh allegations emerged as Mr Pincher said he is seeking “professional medical support” and hopes to return to represent his constituents in Staffordshire “as soon as possible”.

The Mail on Sunday alleged he threatened to report a parliamentary researcher to her boss after she tried to stop his “lecherous” advances to a young man at a Tory party conference.

The Sunday Times alleged he made unwanted passes at two Conservative MPs in 2017 and 2018, after his first resignation as a whip over claims he made unwanted advances to Olympic rower and Conservative candidate Alex Story.

Mr Pincher did not respond to requests for comment on the latest allegations, but the newspapers behind them said he denied the claims.

Downing Street did not deny that there had been concerns about Mr Pincher before his appointment but insisted Mr Johnson “was not aware of any specific allegations”.

Mr Johnson initially resisted calls to remove the whip until Parliament’s Independent Complaints and Grievance Scheme launched an investigation on Friday.

The latest allegations came after the Conservative Party was hit by a series of scandals relating to sexual misconduct.

In May, Neil Parish quit as MP for Tiverton and Honiton after admitting viewing pornography in the Commons chamber.

A month earlier then-Wakefield MP Imran Ahmad Khan was jailed for 18 months for sexually assaulting a 15-year-old boy.

In both cases, the Conservatives lost the ensuing by-elections.

A third unnamed Tory MP has been told by whips to stay away from Parliament after being arrested on suspicion of rape and other offences.

In a statement, Mr Pincher said he would “co-operate fully” with the investigation.