Move could unlock up to £57bn in additional spending on infrastructure in October’s budget

Rachel Reeves must decide by Wednesday whether to change the government’s fiscal rules to potentially unlock up to £57bn in additional spending on infrastructure at this month’s budget.

Sources close to the Treasury said the chancellor would need to make a decision before submitting the “major measures” for her tax and spending event on 30 October to the Office for Budget Responsibility (OBR).