UK Chancellor Jeremy Hunt is set to role out spending cuts totalling £60bn at the Autumn Budget under current plans, including at least £35bn in cuts.
Reports from the Guardian cited a Whitehall source, which claim the figures were still estimates and subject to change, but added that the chancellor had told staff that measures of this scale would be included in his upcoming Autumn statement.
This report comes just as the deadline for submitting data for consideration in the Budget to the Office for Budget Responsibility (OBR) ends today (7 November).
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The report said that decisions on whether to raise benefits in line with inflation or to change the pensions "triple lock" are likely to be taken within days, so that the OBR can factor any such changes into its forecasts.
The Budget was originally planned for 31 October under previous prime minister Liz Truss, but was pushed back by two weeks when Rishi Sunak succeeded her in office.
This was to give time for a full OBR forecast to be published alongside it, but the delay meant that the Bank of England was effectively "flying blind" at its Monetary Policy Committee last week.
The bank raised interest rates by 75 basis points, pushing interest rates to 3%.
The full Budget will be announced on 17 November.