There were signs of a recovery in the month of June when output grew by 8.7 per cent from May, the Office for National Statistics said, just above economists' average expectation in a Reuters poll for an 8 per cent rise.
Some analysts, however, said this likely reflected a catch-up in activity suppressed during lockdown.
The scale of the hit to gross domestic product may revive questions about Prime Minister Boris Johnson's handling of the Covid-19 pandemic.
Britain has suffered Europe’s highest death toll, with more than 50,000 deaths linked to the disease between March 1 and June 30, according to the ONS.
brought on by the coronavirus
pandemic has led to the biggest fall in quarterly GDP on record," Jonathan Athow of the Office for National Statistics said.
"The economy began to bounce back in June... Despite this, GDP in June still remains a sixth below its level in February, before the virus struck."
Last week the Bank of England forecast it would take until the final quarter of 2021 for the economy to regain its previous size, and warned unemployment was likely to rise sharply.
The second-quarter slump in GDP was almost exactly in line with economists' average forecast in a Reuters poll, and exceeded the 12.1 per cent drop in the euro zone and the 9.5 per cent quarter-on-quarter fall in the United States.
"Today's figures confirm that hard times are here," finance minister Rishi Sunak
said. "Hundreds of thousands of people have already lost their jobs, and sadly in the coming months many more will."
The level of output in June was 16.8 per cent below its level a year earlier, compared with a 23.3 per cent fall for May.
Suren Thiru, an economist with the British Chambers of Commerce, said the pick-up towards the end of the quarter probably only reflected the release of pent-up demand rather than the start of a sustained revival. "The prospect of a swift 'V-shaped' recovery remains remote as the recent gains in output may fade over the coming months as the economic damage caused by the pandemic increasingly weighs on activity, particularly as the government support measures wind down," he said.