03/02/2018 10:19 GMT | Updated 03/02/2018 11:43 GMT

Jacob Rees-Mogg Doubles Down On Claim Civil Servants Are Manipulating Brexit Figures In Heated Exchange

'He was told his claim was 'not the behaviour of a man who wishes to lead this country'.

Jacob Rees-Mogg has doubled down on his claim that civil servants are manipulating figures to discourage the Government from Brexit, in a heated on-air exchange.

“I do think they’re fiddling the figures,” the Brexiteer MP told BBC Radio Four’s Today programme, after he was accused of suggesting this in the House of Commons without evidence.

Host Nick Robinson had put it to Rees Mogg that his accusation was “not the behaviour of a man who wishes to lead this country”, adding the “eccentric backbencher” was now being talked about as a future prime minister.

Charles Grant, the think tank chief to whom Rees-Mogg originally attributed the claim, also criticised Rees-Mogg for not apologising for misquoting him, as Brexit Minister Steve Baker had.

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Jacob Rees-Mogg

On Today, Grant said Baker showed he was an “honourable man” but added he was “surprised” Rees-Mogg had not also apologised.

On Thursday, Rees-Mogg said Grant, head of think tank The Centre For European Reform, had told Baker that “officials in the Treasury had deliberately developed a model to show that all options other than staying in the Customs Union were bad and that officials intended to use this to influence policy”.

The minister said this was “essentially correct” but a recording of Grant’s remarks was later released, showing he had not said this.

Robinson asked Rees-Mogg if he would apologise. The MP answered: “The only thing I’ll apologise for is that it turned out to be much more serious than I thought.”

He hit out at officials for breaching the ministerial code, saying they were giving journalists pessimistic briefings about Brexit without their minister’s permission.

“With all forecasts, the assumptions you make at the beginning, determine the outcome that you get,” he said, accusing the Treasury of trying to “invent policy”.

Peter Nicholls / Reuters
Steve Baker apologised for telling the House of Commons that Jacob Rees-Mogg's characterisation of Charles Grant's comments was right

Grant said: “The Treasury’s not trying to undermine the government policy... Once you decide to leave the EU, you can consider various ways of doing it.

“The Treasury cares about economics so is naturally pushing for the sorts of Brexit that minimise the economic damage... Many people the Treasury think we should for go that less damaging option.”

He dismissed Rees-Mogg’s attack on officials for briefing him about Brexit. He added: “Of course everybody in think tanks speaks to govern officials. That’s how think tanks work.”

Robinson said Rees-Mogg was “an amusing backbench eccentric” but was now “the leading figure in terms of backbench Brexiteers and many ministers say you’re a likely candidate to be our next Prime Minister”.

The host asked: “Do you not accept that to accuse civil servants of rigging official forecasts is not the behaviour of a man who wishes to lead this country?”

Rees-Mogg said The Treasury’s pre-Brexit referendum forecasts were “a humiliation” and “clearly politically influenced”.

When Robinson pushed him on whether they were rigged, Rees-Mogg said: “The Office for Budget Responsibility was set up by George Osborne because Treasury forecasts had been politicised and it was thought they were unreliable on political grounds.

“With the referendum with the EU, the Treasury has gone back to making forecasts. It was politically advantageous for them. So yes, I do think they are fiddling the figures.”

A Treasury spokeswoman dismissed Rees-Mogg’s suggestion.

She told HuffPost: “Both Treasury ministers and officials are working hard to deliver the best Brexit deal for Britain.

“The Prime Minister and the Chancellor have said repeatedly that we will be leaving both the Single Market and the Customs Union. Any suggestion to the contrary is simply false.”