Rachel Reeves faces the prospect of another "groundhog day" unless next month's budget goes further than plugging an estimated £22bn black hole in the public finances, according to a respected thinktank.

The Institute for Fiscal Studies (IFS) said there was a "strong case" for the chancellor to substantially increase the £10bn headroom she has previously given herself against her own debt rules, or risk further repeats of needing to restore the buffer in the years ahead.

It said Ms Reeves could bring the cost of servicing government debt down through ending constant chatter over the limited breathing space she has previously given herself, in uncertain times for the global economy.

The chancellor herself used an interview with Sky News this week to admit tax rises were being con

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