Large events such as concerts and clubbing are believed to be 'no riskier' than visiting restaurants and shopping centres, according to studies.
The Government has held pilot event trials over the last few weeks - including a face mask-free Blossoms concert in Sefton Park and the Brit awards.
Preliminary data from the research programme suggests that screening and improved ventilation can significantly reduce the risk of virus transmission, The Times has reported.
It means that mass events, without masks and social distancing, may be as safe as many of the other leisure activities that are currently allowed to go ahead.
There are hopes that the findings will support the current roadmap, which would allow clubbing and concerts to resume on June 21.
The decision on further easing is due next month.
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The results are also likely to strengthen the case for Covid-status certification - either proof of vaccine or a negative test result.
Other events in the pilot programme were the World Snooker Championship in Sheffield and a business conference and nightclub event in Liverpool.
Ticket-holders had to show a negative test result to attend their event, and were also asked to get a test after the concert.
Attendees were monitored over CCTV, and wore devices which tracked how many others they came into contact with.
A government source told The Times that the results from the trials had been encouraging and further test events were planned for the coming weeks.
The source said: "We are still waiting for the final bits of data but the results so far have been very encouraging.
"It will help make the case that these large events are not inherently more risky than other parts of the hospitality sector.
"It shows that there are things that you can do to make these settings as safe as other daily activities.
"It is true that they are not going to be 100 per cent safe but you can lower the risk to a reasonable level.”
