LONDON, ENGLAND - DECEMBER 20: The Salisbury pub in Covent Garden offers take away beer as new lockdown restrictions come into effect on December 20, 2020 in London, England. London and the South East enter a 'Tier 4' lockdown as a new coronavirus strain is detected in the lead up to Christmas. (Photo by Joseph Okpako/Getty Images)
Police and port staff turn away vehicles from the Port of Dover in Kent which has been closed after the French government's announcement it will not accept any passengers arriving from the UK for the next 48 hours amid fears over the new mutant coronavirus strain.
DECEMBER 20th 2020: Emergency lockdown restrictions are imposed in The United Kingdom during the worldwide coronavirus pandemic as health officials take measures to prevent a new variant of the virus from affecting greater Europe. - File Photo by: zz/KGC-246/STAR MAX/IPx 2020 3/19/20 Idle passenger airplanes parked on the apron at Manchester Airport on March 19, 2020 as The Coronavirus limits air travel around the world. (Manchester, England, UK)
A DFDS ferry leaves from the Port of Dover which has been closed after the French government's announcement it will not accept any passengers arriving from the UK for the next 48 hours amid fears over the new mutant coronavirus strain.
Shoppers wearing face masks walk on the street.
Prime Minister Boris Johnson announced on Saturday 19 December, that London and South East of England will move into Tier four restrictions and asked people to 'stay at home'. (Photo by Dinendra Haria / SOPA Images/Sipa USA)
A sign on the M56 motorway informs drivers that all routes into France are closed at the junction with the M6 at Lower Stretton near Warrington, northwest England, on December 21, 2020. - The British prime minister was to chair a crisis meeting on December 21 as a growing number of countries blocked flights from Britain over a new highly infectious coronavirus strain the UK said was "out of control". Crucial transit country France moved to block people and goods crossing the Channel, while the Netherlands said passengers arriving by ferry would be denied entry. (Photo by Paul ELLIS / AFP) (Photo by PAUL ELLIS/AFP via Getty Images)
LONDON, ENGLAND - DECEMBER 20: People order takeout at restaurants in Chinatown on December 20, 2020 in London, England. London and the South East enter a 'Tier 4' lockdown as a new coronavirus strain is detected in the lead up to Christmas. (Photo by Joseph Okpako/Getty Images)
Hollie Doyle poses with her third placed award during the BBC Sports Personality of the Year 2020 at MediaCityUK, Salford. (Photo by Peter Byrne/PA Images via Getty Images)
John Henderson picks his darts out of the dartboard during day six of the William Hill World Darts Championship at Alexandra Palace, London. (Photo by Kieran Cleeves/PA Images via Getty Images)
Leicester's Jamie Vardy shoots and scores from the penalty sport for the opening goal of the game during the English Premier League soccer match between Tottenham Hotspur and Leicester City at the White Hart Lane stadium in London, Sunday, Dec., 20 2020. (Julian Finney/ Pool via AP)