Theresa May dresses up in a hi-viz jacket to mock George Osborne

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Her jokes may have bombed at Prime Minister's Questions, but Theresa May pulled off that classic political stunt last night – mocking the ever popular George Osborne.

At the Spectator awards ceremony last night, the PM accepted an award from the former Chancellor dressed in his trademark attire of hard hat and hi-viz jacket.

But she didn't stop there.

After Foreign Secretary Boris Johnson said Britain would make a "Titanic success of Brexit" to cries from the audience of “it sank!”, the Prime Minister told the Foreign Secretary she would not hesitate in putting him down, as Michael Heseltine had done to his mother’s dog.

The Prime Minister also took aim at David Cameron’s former communications chief Craig Oliver, telling the audience: "I’m particularly pleased to see that Craig Oliver… sorry Sir Craig, is here tonight. In his book he said that when he heard the result of the referendum, he walked out of the office and as he walked into Whitehall started wretching violently.

"I have to say that I think we all understand that feeling, most of us experienced it too when we saw his name on the resignations honours list."

But perhaps it was Osborne who had the last laugh.

Speaking at the London School of Economics also last night, Mr Osborne slammed his boss's suggestion that immigration causes unemployment – noting that the claim is contradicted by “hard data”.

"I don’t really buy the argument that there’s a big pool of British people who don’t have jobs and who need jobs.