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Chancellor Philip Hammond has been hit by a £900million black hole thanks to Brexit, according to a shock report.

It warned that uncertainty created by leaving the EU was partly to blame for stamp duty land tax intake being cut by this sum in the last year.

Labour former Shadow Chancellor Chris Leslie MP last night called the revelation a “Brexit bombshell”.

The Office for Budget Responsibility, Government’s own economic watchdog, dealt Mr Hammond a further blow by downgrading Britain’s future growth prospects.

Its latest forecast evaluation report said of SDLT intake: “Receipts were £0.9billion lower than our March 2016 forecast. The underlying forecasting shortfalls largely reflected weakness in the commercial sector, which reflected uncertainty in the run-up to and following the EU referendum .”

(Image: Getty) (Image: PA)

Stamp duty is the tax levied on buying property or land above a certain value.

The £900million shortfall could have been used to pay the annual salaries of some 39,000 nurses or around 18,000 GPs, according to anti-Brexit group Open Britain.

Mr Leslie, a supporter of the group, said: “The Government’s own forecasters are perfectly clear that the Brexit vote has reduced the tax take, leaving less money to spend on our hard-pressed public services.

“It’s about time ministers acted to stop this Brexit bombshell. That means reversing their ideological choice to leave the Single Market and the Customs Union, and supporting our economy.”

(Image: PA)

A Treasury spokeswoman said: “At Budget 2016 we reformed stamp duty on non-residential property transactions, cutting the tax many businesses... pay when purchasing property. As a result of these changes over 90% of non-residential property transactions will pay the same or less in SDLT.”

OBR’s review of its own past forecasting said productivity has grown by just 0.2% a year for the past five years, far less than expected, and warned of weak growth in the next five years.

It will likely derail Mr Hammond’s Budget plans next month.