Boris Johnson further weakened by long-time aide’s resignation over Savile slur

One of Boris Johnson’s most loyal aides has resigned over his use of a “scurrilous” Jimmy Savile smear against Sir Keir Starmer, further imperilling the Prime Minister’s grip on power.

Munira Mirza quit as No 10’s head of policy on Thursday after the Prime Minister refused to apologise for the “partisan reference to a horrendous case of child sex abuse”.

Mr Johnson had earlier backtracked on the widely criticised and debunked claim that the Labour leader failed to prosecute Savile while director of public prosecutions (DPP).

But Ms Mirza, a long-time ally since his days as London mayor, said she was quitting after the Prime Minister stopped short of giving the apology she demanded.

“I believe it was wrong for you to imply this week that Keir Starmer was personally responsible for allowing Jimmy Savile to escape justice,” the letter seen by the Spectator magazine read.

“There was no fair or reasonable basis for that assertion. This was not the usual cut and thrust of politics; it was an inappropriate and partisan reference to a horrendous case of child sex abuse. You tried to clarify your position today but, despite my urging, you did not apologise for the misleading impression you gave.

“You are a better man than many of your detractors will ever understand which is why it is so desperately sad that you let yourself down by making a scurrilous accusation against the Leader of the Opposition.”

Downing Street said in a statement it was “very sorry” that she was quitting, as MP Andrew Griffith was swiftly appointed to fill her role.

The resignation of one of his most loyal allies, who has worked with him for more than a decade, leaves the Prime Minister further isolated as he battles to remain leader.

The Tory revolt against Mr Johnson over allegations of lockdown-breaching parties in No 10 was growing, with 13 Conservative MPs calling for his resignation.

Mr Johnson once praised Ms Mirza as a “brilliant thinker” and listed her as one of the five women who had influenced and inspired him the most.

Dominic Cummings, the former chief aide to No 10 who is agitating for the Prime Minister’s removal, said her resignation was an “unmistakable signal the bunker is collapsing”, adding that the “PM is finished”.

On Monday, Mr Johnson accused Sir Keir of having “used his time prosecuting journalists and failing to prosecute Jimmy Savile” as he came under huge pressure in the Commons over Sue Gray’s report into alleged lockdown breaches.

The deployment of the falsehood for political gain further enraged Tory MPs and led to criticism from lawyers representing Savile’s victims.

The Prime Minister tried to backtrack on his claim on Thursday, trying to insist he was not referring to Sir Keir’s “personal record”.

“I want to be very clear about this because a lot of people have got very hot under the collar, and I understand why,” he told broadcasters in Blackpool.

“Let’s be absolutely clear, I’m talking not about the Leader of the Opposition’s personal record when he was DPP and I totally understand that he had nothing to do personally with those decisions. I was making a point about his responsibility for the organisation as a whole.

“I really do want to clarify that because it is important.”

The Prime Minister had been refusing to withdraw the claim, and maintained his stance in an interview with The Sun by saying the slur was “fairly accurate”.

During Prime Minister’s Questions on Wednesday, he went on to point to the fact that Sir Keir apologised while DPP in 2013 for the CPS having failed to bring Savile to justice four years earlier.

But there is no evidence that Sir Keir had any personal role in the failure to prosecute the man who was one of Britain’s most egregious sex offenders before his death in 2011.

The Labour leader accused Mr Johnson of “parroting the conspiracy theories of violent fascists to try to score cheap political points”.