UK public spending to top £1tn a year, thinktank forecasts

Resolution Foundation says government borrowing will rise to 40% of GDP, eclipsing the Tony Blair years

Boris Johnson is planning to ramp up government borrowing to spend more than 1tn a year, increasing the size of the British state to make it bigger than at any point under the 10-year premiership of Labour's Tony Blair.

Analysis from The Resolution Foundation predicts government spending will rise above the 1tn mark for the first time in history by 2023-24. The report, published on Monday, comes as the chancellor, Rishi Sunak, prepares to deliver what is widely expected to be one of the most expansionary Conservative budgets in a generation.

Related: Government spending 'set to return to levels last seen in the 1970s'

Gross domestic product (GDP) measures the total value of activity in the economy over a given period of time.