LONDON, UNITED KINGDOM – MAY 10: (L-R) Chief Medical Officer Professor Chris Witty, Britain’s Prime Minister Boris Johnson and Chief scientific adviser Sir Patrick Vallance attend a virtual press conference to announce changes to lockdown rules in England at Downing Street on May 10, 2021 in London, England. Johnson announced that Step Three of England’s roadmap out of lockdown can be enacted come May 17, 2021 as the UK Chief Medical Officers and NHS England National Medical Director agreed to reduce the level of risk from Covid-19 from alert 4 to 3 today. Deaths and cases have reduced significantly since the UK rolled out its vaccination programme with a total of 17,669,379 people having received both jabs. This is the equivalent of 33.5% of all people aged 18 and over. (Photo by Dan Kitwood-WPA Pool/Getty Images)