Rachel Reeves has hit out at the Budget watchdog for an unprecedented leak of key details of the Budget .

A visibly furious Chancellor said it was clear there had been a "serious error" by the Office for Budget Responsibility, saying it was "deeply disappointing". She emphasised to MPs that it was "their breach", for which they have now taken responsibility.

Opening her Budget statement, she told the Commons: "It is my understanding that the Office for Budget Responsibility's economic and financial outlook was released on their website before this statement.

"This is deeply disappointing and a serious error on their part. The Office for Budget Responsibility have already made a statement, taking full responsibility for their breach."

The watchdog apologised for a "technical error" th

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