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Chancellor Philip Hammond has issued a brutal slapdown to Boris Johnson for using the misleading 'Brexit dividend' to demand more money for the NHS.

Allies said the Foreign Secretary is set to confront Theresa May face-to-face today with his controversial demand for £100 million a week for the NHS after Brexit.

But the Chancellor, who will not attend today's Cabinet meeting as he is meeting finance ministers in Brussels, issued a firm rebuke to Johnson for overstepping his role.

He said: "Mr Johnson is the Foreign Secretary.

"I gave the health secretary an extra £6bn at the recent budget and we will look at departmental allocations again at the spending review when that takes place."

(Image: PA) (Image: PA)

Tory backbencher Anna Soubry also piled in to criticise Mr Johnson on Twitter.

"PM should have sacked Boris Johnson for longstanding incompetence & disloyalty," she wrote. "Unless [Theresa May] acts now Boris will bring her down."

She added: "Any decent [Foreign Secretary] would have stepped down re" Nazanin Zaghari-Ratcliffe. But then any decent For Sec wouldn’t have behaved as Boris did"

Theresa May's former chief of staff Nick Timothy also hit out at Johnson.

"Breaching collective responsibility and leaking Cabinet discussions are bad enough but part of political life," he said.

"But pre-briefing your disagreement with Government policy ahead of Cabinet?"

Mr Johnson first resurrected his spurious promise last week as he defended his claim Britain will take back control of £350million a week in total.

The UK Statistics Authority had branded that figure - emblazoned on the side of Brexit campaign Vote Leave's battle bus - "a clear misuse of official statistics" because it includes money not sent to Brussels at all and does not count EU funding in the UK.

Yet Mr Johnson claimed it was now even higher and will rise to £438million.

(Image: PA)

Shadow Brexit Secretary Sir Keir Starmer reported him to the statistics watchdog and is awaiting a reply.

Jeremy Hunt backed Boris Johnson's call for NHS cash - but distanced himself from the claim it could be £100million a week.

The Health Secretary told the Commons Health Committee: "I don’t think any Health Secretary is ever going to not support potential extra resources for his or her department.

"Obviously I can’t tell you about the precise contents of a Cabinet discussion."

He added: "There was a Brexit debate and there was an NHS debate and just occasionally those two debates come together."

But asked where the so-called £100million from Brexit will actually come from, he replied: "I think that’s a question you have to ask the Foreign Secretary."

Meanwhile Labour MPs were briefed on the party's own plans for emergency Budget to pump £5billion into the NHS.

The demand - revealed by the Sunday Mirror - was raised at tonight's meeting of the Parliamentary Labour Party ahead of the party leader attending an NHS rally on Thursday.