Tier 4

The prime minister said he might take a "national approach" to lifting the current lockdown.
But the same data show overall infection numbers remain incredibly high.
The strictest lockdown rules will come into force on New Year's Eve, Matt Hancock announced on Wednesday.
UK Health Minister Matt Hancock makes a statement to parliament regarding review of coronavirus restrictions.
Some places in tiers 2 and 3 now have higher rates of infection than those in the strictest lockdown.
Health secretary Matt Hancock will make a statement in the Commons regarding the lockdown restrictions.
Health secretary Matt Hancock leads a Downing Street press conference as the R number in Britain rises following the discovery of a mutant strain of coronavirus.
These five stats show just how worrying the pandemic is right now.
Communities secretary Robert Jenrick has said the new variant is "prevalent probably in most regions of the country”.
Here is a check on the home secretary's claim – featuring lockdown, face masks, Test and Trace and Christmas rules.