Reports that Christmas is cancelled for London, South East and East, as areas moved into new Tier 4 with “stay at home” message by law. No travel allowed…

Cabinet meeting has just finished, embargoed Lobby briefing due at 14:30, announcement from PM expected for 16:00.

Confirmed: The PM will hold a press conference at 16:00 with the chief medical officer Chris Whitty and the chief scientific adviser Sir Patrick Vallance.