Britain’s economy has seen its largest contraction in more than four decades, according to figures from the Office for National Statistics (ONS). The nation’s gross domestic product plunged further than expected, by 2.2 percent.

That’s the biggest decline since the third quarter of 1979. The ONS had previously estimated a two percent drop, but it revised the figure after data showed a record 6.9 percent slump in March.

According to recent ONS monthly figures, the economy nosedived by 20.4 percent in April, which is the largest drop in a single month since records began. The decline was three times greater than that seen during the whole of the 2008-9 economic downturn.

Earlier this month, the Bank of England warned the economy may have contracted by 20 percent in the first half of 2020.

“Our more detailed picture of the economy in the first quarter showed GDP shrank a little more than first estimated,” said Jonathan Athow, deputy national statistician at the ONS. “All main sectors of the economy shrank significantly in March as the effects of the pandemic hit.”

Statistics showed the household savings ratio soared to 8.6 percent in the first quarter from 6.6 percent in the previous three months, reflecting the cutback in consumer spending. Athow said that “the sharp fall in consumer spending at the end of March led to a notable increase in households’ savings.”

UK Prime Minister Boris Johnson is expected to report on the economy on Tuesday and to set out plans to accelerate £5 billion (over $6 billion) of spending on infrastructure projects.

Britain’s current account deficit ballooned to £21.1 billion ($26 billion) during the quarter, from £9.2 billion ($11 billion) in the fourth quarter of 2019.

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