British public borrowing surged again in August to a new record high, driven by huge outlays to combat the coronavirus pandemic, with the budget deficit so far this tax year overtaking its full-year peak during the global financial crisis.
The UK government has now borrowed £173.7 billion in the five months since the start of the financial year in April.
This outstripped the previous record of £157.7 billion set in the 12 months ending March 2010.
UK government budget forecasters have warned the deficit could hit £372 billion by the end of the tax year, raising borrowing as a share of gross domestic product to 18.9%, a level not seen since World War Two - and far above long-term sustainable rates.
Finance minister Rishi Sunak said yesterday that now was the time to focus on restoring growth, not reducing borrowing, but tough decisions would be needed in the longer term.
Despite this, he has cut support for people whose work remains jeopardised by the pandemic.
Rishi Sunak said that from November the government would only subsidise "viable" jobs, where people were working at least a third of their normal hours, ending a programme where the government had paid up to 80% of furloughed employees' wages.
Many economists and trade unions fear this could lead to a big rise in unemployment for people in sectors such as hospitality, arts and entertainment that continue to bear the brunt of government coronavirus restrictions.
Morgan Stanley economists said Sunak could need to reverse course and provide extra support.
"We think the risks to the deficit are to the upside, with the Chancellor likely to provide additional support if restrictions tighten further, or unemployment surprises," Jacob Nell and Bruna Skarica wrote.
UK borrowing in August alone jumped to £35.9 billion - just below economists' average forecast of £38 billion in a Reuters poll - while July's figure was revised down by £11 billion to £15.4 billion.
Britain's Office for National Statistics said the revisions partly reflected difficulties assigning government spending to specific months.
Public sector net debt in August reached £2.024 trillion - or 101.9% of GDP, the highest as a share of the economy since the 1960-61 financial year.
Britain suffered the biggest economic hit of any G7 economy from the coronavirus during the second quarter of this year, with output collapsing by 20%, and the Bank of England estimates third-quarter output will be around 7% below pre-crisis levels.
But despite heavy borrowing, the British government's interest costs on financial markets are near record lows, due to global gloom about the economic outlook and a long-term fall in interest rates.