A handout image released by 10 Downing Street, shows Britain's Prime Minister Boris Johnson returning to 10 Downing Street in central London on April 27, 2020 after making a statement to the media on his first day back at work following more than three weeks off after being hospitalised with the COVID-19 illness. - Prime Minister Boris Johnson on Monday made his first public appearance since being hospitalised with coronavirus three weeks ago, saying Britain was beginning to "turn the tide" on the outbreak but rejecting growing calls to ease a nationwide lockdown. (Photo by Andrew PARSONS / 10 Downing Street / AFP) / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / 10 DOWNING STREET / ANDREW PARSONS " - NO MARKETING - NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS