More than 16 million people in London, parts of the south east and east of England have been placed into a new Tier 4, with extremely strict travel regulations. In addition, the Christmas easing allowing three households to mix has been reduced to a single day: 25 December.
“This is not the moment to have unnecessary travel,” says the government’s chief medical officer, Chris Whitty.
Read more: Can you travel in and out of Tier 4 areas?
These are the key questions and answers, starting with the