The country's top medic has admitted it was a mistake not to cancel the Cheltenham Festival and Liverpool's Champions League tie against Atletico Madrid in March 2020.
Professor Sir Chris Whitty said allowing the large sporting events to go ahead led the public to think they did not need to worry about the spread of Covid.
The Liverpool match took place on March 11, the same day as the World Health Organisation declared that coronavirus was a pandemic. Around 3,000 Atletico fans were allowed to travel to England to watch the match, along with 50,000 home supporters.
In the same week, Cheltenham Festival was also allowed to go ahead, attracting more than 250,000 spectators. Just 10 days after the four-day event came to a close, Boris Johnson announced the first national lockdown on March 23.
As he appeared at the Covid Inquiry, the Chief Medical Officer said that in retrospect the events should not have taken place. Sir Chris said: "The risks of outdoor events, even if quite crowded, is small relative to many of the other things..I think what we really were not paying enough attention to, and it's sort of obvious with hindsight, is the message this was sending to the general public - that the government couldn't be that worried because it was not closing the mass gatherings.
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"So I think that the problem was not the gatherings themselves, which I don't think there's good evidence had a major material effect directly. But the impression it gives of normality at a time that what you're trying to signal is anything but normality. So I think, again, were we to rerun, I think that's one of the things we would I would certainly do differently."
Follow our live coverage from the hearing below