Prime Minister Liz Truss has been on a media tour defending her tax-cutting ‘mini-budget’ amid fierce criticism from the left and central bankers. Truss, who is attempting to boost growth by, among other things, cutting green levies and, controversially, the top 45 per cent rate of income tax for earnings over £150,000 — rather than the 40 per cent rate of income tax on earning from £50,000 to £150,000, which impacts mainly on the squeezed middle class — has been accused of “undercutting” the country’s central bank, which is largely unaccountable to the government, by Mark Carney, its former governor.