Jonathan Loynes, chief UK economist at Capital Economics, said: 'We expect borrowing to overshoot the Chancellor's forecast by at least £2bn this year and a bigger overshoot is perfectly possible. The Treasury has suggested that the public finances will improve in the last few months of the year thanks to an oil-related boost to tax receipts. But this looks very unlikely to make up all of the shortfall and, in any case, spending is overshooting too.'