LONDON and the south-east have been plunged into Tier 4 coronavirus restrictions - the highest level of England's lockdown system.
From Boxing Day, a raft of other areas in the South and East of England were also plunged into the highest tier, in a bit to control a new mutant Covid strain. But what are the differences between Tier 3 and Tier 4 rules?
People in Tier 4 can still go to work - but only as a last resort if they cannot work from home.
In Tier 3, people can leave home and travel to other areas for any medical reason, including to get a Covid test, to be with someone who is giving birth, to escape domestic abuse, or to get treatment for a pet.
But those in Tier 4 won't be allowed to leave their area to travel elsewhere, unless it's for one of the reasons above.
Meeting people indoor and outdoors
Brits living in Tier 4 areas will not be allowed to meet other households inside or stay overnight anywhere else.
The Government says those in these areas must stay in their homes to help combat the spread of the adapted virus.
One person can meet one other person outside in a public place.
But those in Tier 3 are permitted to meet others outside using the Rule of Six.
3
People are ordered to stay at home in Tier 4 except for essential reasons
Non-essential shops
In Tier 3, all shops including non-essential retail such as clothing, toys and home-ware remain open.