Boris Johnson was accused of “running this country down” and mocked over an “inevitable” U-turn on a windfall tax during a rowdy Prime Minister’s Questions.

Just minutes after the publication of the report on lockdown-busting parties in Downing Street, Labour leader Sir Keir Starmer channelled his inner Mrs Merton when he asked the Prime Minister: “What is it about the Sue Gray report that first attracted him to a U-turn this week?”

During an appearance on The Mrs Merton Show in the 1990s, Caroline Aherne famously asked TV star Debbie McGee: “What attracted you to the millionaire Paul Daniels?”

Mr Johnson replied: “There is no surprise about Labour’s lust to put up taxes.”

With inflation at a 40-year high, the Government has been repeatedly pressed to introduce a windfall tax on oil and gas firms to help fund support for those who are struggling.

Sir Keir said he wanted to use PMQs to focus on cost of living and said: “It sounds like he’s finally seen sense and the inevitable U-turn may finally have arrived.

“So when can people across the country expect him to use those oil and gas profits to bring down their bills?”

The Prime Minister responded: “There is nothing original about a Labour plan to tax business. They want to tax business the whole time, every day Labour wants to put up taxes on business.”

Mr Johnson later claimed Sir Keir “loves running the country down”, with the Labour leader replying: “He talks about running this country down, he is running this country down.

“It wasn’t just complacency on Labour’s windfall tax, which he’s now backing. It wasn’t just complacency on inflation, which is now through the roof. And it wasn’t just complacency on growth, which is now spluttering along at the back of the pack.

“Because his Chancellor also claimed that people should keep more of the rewards of their efforts, and then he put their taxes up.”

Sir Keir questioned how Mr Johnson’s “15 tax rises” since taking office have helped people keep more of their own money.

Mr Johnson replied: “What we’re doing is making sure after a huge pandemic that we’re funding our vital public services, which we can, because of the steps we’ve taken.”

He outlined minimum wage increases and changes to Universal Credit as ways the Government has helped people keep more money.

Mr Johnson added: “He’s completely wrong about this country’s growth performance, he runs it down, he was proved wrong about Covid and he’s going to be proved wrong again.”

Sir Keir countered: “Just delusional.”

He went on to warn over reports of a 500,000-passport backlog at the Home Office, noting: “That’s potentially more than half a million people worrying whether they will get away this summer.

“Can the Prime Minister reassure people that they won’t miss out on their holidays due to the failures of his Home Office?”

He (Sir Keir Starmer) campaigned to put Vladimir Corbyn, I mean, sorry Jeremy Corbyn in Downing Street

Mr Johnson said the Government has been “massively increasing” the speed at which the Passport Office delivers, adding: “To the best of my knowledge everybody is getting their passport within four to six weeks.”

The Prime Minister was heckled by the opposition benches as he attempted a run through of his greatest hits in office, which included a reference to Brexit and support for Ukraine, before criticising Labour MPs for their approach on defence matters.

Mr Johnson said of Sir Keir: “He campaigned to put Vladimir Corbyn, I mean, sorry Jeremy Corbyn in Downing Street.”

Labour MP Christian Wakeford (Bury South), who defected from the Tories, said Mr Johnson has been drafting “half-arsed apologies” and asked if he had changed his mind on a windfall tax “just to save his own neck”.

Andy McDonald, Labour MP for Middlesbrough, said: “When we saw pictures of the PM partying in the middle of the pandemic, was he toasting his assault on the working class?

“I ask him – how on earth does he sleep at night with so much blood on his filthy, privileged hands?”