Six countries have been added to the UK's red list after scientists there said they are worried about a new variant of coronavirus.
The B.1.1.529 variant has first been found in cases in Botswana, South Africa and Hong Kong. People who have recently visited South Africa - where the bulk of the variants have been found so far - and returned to the UK are being contacted for testing to see if they contracted it overseas.
But how is this new variant different from previous versions and how dangerous is it? Here is everything you need to know. When did it first appear? UK scientists first became aware of the new strain on 23 November after samples were uploaded on to a coronavirus variant tracking website from South Africa, Hong Kong and then