Boris Johnson’s discredited claim that Sir Keir Starmer personally failed to prosecute Jimmy Savile is “certainly not to blame” for the mob intimidation of the Labour leader, a minister has told Sky News.

Technology minister Chris Philp told Kay Burley Mr Johnson’s words in Parliament last week “did not prompt the terrible harassment and intimidation” of Sir Keir yesterday, but described the incident as “terrible”.

Mr Philp also maintained that the PM had “clarified” his remarks in the last few days when asked if the prime minister should issue an apology.

On Monday evening, the Labour leader was bundled into the back of a police car after being confronted by protesters shouting “traitor” and “Jimmy Savile” at him.

Tories turn on Johnson over ‘Trumpian politics’ as pressure mounts on PM – politics live

PM’s Savile remarks not ’cause’ of Starmer incident

The incident brought fresh condemnation of the PM, with some MPs from his own party calling for Mr Johnson to issue an apology for his remarks.

“I don’t think you can point to what the prime minister said as the cause of that,” , Mr Philp told Sky News.

“You certainly can’t blame him for the fact that that mob were clearly behaving in a totally unacceptable way.”

He continued: “Keir Starmer’s own website says he was responsible overall for the CPS, and, in fact, Keir Starmer himself apologised for the CPS’s failings, just in the same way that the PM has apologised for the failings in Number 10.”

Mr Philp also suggested that people in last night’s mob in Westminster “have previously done similar things” to other politicians including Michael Gove.

Starmer confronted by protestors

In video footage posted on social media on Monday evening, the Labour leader was seen walking near to Parliament surrounded by police officers while being mobbed by a group, some of whom were protesting against COVID measures.

At one point in the footage, a member of the group surrounding Sir Keir, was overheard making a baseless claim, by shouting: “Why did you let Jimmy Savile off?”

While one of the group, supporters of what they called a “freedom convoy” and “freedom movement”, was heard accusing the Labour leader of “protecting paedophiles”.

Moments after the incident, Sir Keir was led to a nearby police car before being driven away at speed with the vehicle’s lights flashing.

Conservative MPs call for PM to apologise

Those from the prime minister’s own backbenches calling on him to apologise for his initial comments include former cabinet minister Julian Smith, who posted on Twitter: “What happened to Keir Starmer tonight outside parliament is appalling.

“It is really important for our democracy and for his security that the false Savile slurs made against him are withdrawn in full.”

Senior Conservative backbencher Sir Roger Gale, who has submitted a letter of no confidence in Mr Johnson, expressed his fear that the “grim scenes” were “the direct result of the deliberately careless use of language” in the Commons chamber.

Another senior Tory Tobias Ellwood suggested there is currently “a drift towards a Trumpian style of politics”.

Sadiq Khan, Labour’s London mayor, expressed his “solidarity” with Sir Keir and shadow foreign secretary David Lammy, who was walking with the Labour leader at the time of the incident, as he thanked the police for their actions.

“This is what happens when fake news is amplified and given credibility by people who should know better,” Mr Khan added.

Meanwhile, Scotland’s First Minister Nicola Sturgeon said the PM “will now apologise unreservedly” if he “has any decency at all”.

PM responds to incident

Mr Johnson himself tweeted on Monday evening: “The behaviour directed at the leader of the opposition tonight is absolutely disgraceful. All forms of harassment of our elected representatives are completely unacceptable.

“I thank the police for responding swiftly.”

While Home Secretary Priti Patel said that all MPs “must be able to go about their lives without fear of threats or intimidation”.

A Labour source revealed Sir Keir was back at his desk straight after the incident.

The Metropolitan Police said in a statement: “Shortly after 5.10pm on Monday, February 7, a man who had been surrounded by a group of protesters near to New Scotland Yard, was taken away from the scene by a police car.

“A man and a woman were arrested at the scene for assault of an emergency worker after a traffic cone was thrown at a police officer.

“They have been taken into custody.”

The prime minister last week saw his policy chief, Munira Mirza, quit over his use of the Savile claim about Sir Keir.

She resigned from her Number 10 role after revealing she had implored Mr Johnson to apologise for the remarks.

Despite attempting to “clarify” his claim about the Labour leader, the prime minister has stopped short of apologising for the comments.