Photo taken on June 2, 2020 shows the entrance to Camden Market in London, Britain. British Prime Minister Boris Johnson on May 28 unveiled some "limited" and "cautious" easing of the country's coronavirus lockdown measures. Outdoor retail and car showrooms started to open from June 1 and other non-essential retail will open on June 15. (Photo by Ray Tang/Xinhua)

Photo taken on June 2, 2020 shows a sign indicating hand sanitiser for visitors at Camden Market in London, Britain. British Prime Minister Boris Johnson on May 28 unveiled some "limited" and "cautious" easing of the country's coronavirus lockdown measures. Outdoor retail and car showrooms started to open from June 1 and other non-essential retail will open on June 15. (Photo by Ray Tang/Xinhua)

A woman buys food at a stall at Camden Market in London, Britain, June 2, 2020. British Prime Minister Boris Johnson on May 28 unveiled some "limited" and "cautious" easing of the country's coronavirus lockdown measures. Outdoor retail and car showrooms started to open from June 1 and other non-essential retail will open on June 15. (Photo by Ray Tang/Xinhua)

Photo taken on June 2, 2020 shows social distancing signage for visitors at Camden Market in London, Britain. British Prime Minister Boris Johnson on May 28 unveiled some "limited" and "cautious" easing of the country's coronavirus lockdown measures. Outdoor retail and car showrooms started to open from June 1 and other non-essential retail will open on June 15. (Photo by Ray Tang/Xinhua)

People queue up at a food stall at Camden Market in London, Britain, June 2, 2020. British Prime Minister Boris Johnson on May 28 unveiled some "limited" and "cautious" easing of the country's coronavirus lockdown measures. Outdoor retail and car showrooms started to open from June 1 and other non-essential retail will open on June 15. (Photo by Ray Tang/Xinhua)

People queue up to buy food at Camden Market in London, Britain, June 2, 2020. British Prime Minister Boris Johnson on May 28 unveiled some "limited" and "cautious" easing of the country's coronavirus lockdown measures. Outdoor retail and car showrooms started to open from June 1 and other non-essential retail will open on June 15. (Photo by Ray Tang/Xinhua)