The door of 10 Downing Street, in London, Sunday, Dec. 13, 2020. (AP Photo/Alberto Pezzali)
LONDON, Dec. 13, 2020 -- A woman wearing a face mask walks along Westminster Bridge in central London, Britain, on Dec. 13, 2020. Britons who have been in contact with someone who has tested positive for coronavirus will have to self-isolate for 10 days instead of 14, Britain's chief medical officers announced Friday.
The new measure, coming into effect from Monday, also applies to those required to quarantine after returning from countries which are not on Britain's travel corridor list. (Photo by Han Yan/Xinhua via Getty) (Xinhua/Han Yan via Getty Images)
Arsenal's manager Mikel Arteta watches the play during an English Premier League soccer match between Arsenal and Burnley at the Emirates stadium in London, England, Sunday Dec. 13, 2020. (Laurence Griffiths/Pool via AP)
Larry, official number 10 pest controller walks outside 10 Downing Street, in London, Sunday, Dec. 13, 2020. Facing yet another self-imposed Brexit deadline on Sunday, the chief negotiators from the European Union and United Kingdom were making last-ditch efforts to scale differences on a trade deal that have proved insurmountable for the best part of the year. (AP Photo/Alberto Pezzali)