Run down of new rules in Scotland:
From 26 December, for up to three weeks, there will be a limit on the size of live public events in Scotland - 500 for outdoor events, indoors 200 seated or 100 standing.
This will mean sports such as football matches will have to take place without spectators and large-scale Hogmanay celebrations, such as Edinburgh's world famous party, will be cancelled.
The restrictions do not apply to private life events, such as weddings.
From 27 December for three weeks all hospitality venues in Scotland will have to operate on a table service only basis if they serve alcohol.
Groups of people will be limited to three households.
The Scottish government intends to issue guidance that non-professional indoor contact sports for adults should not take place during the three-week period from 26 December.
Ms Sturgeon confirms the advice for Christmas remains unchanged.
But from 27 December she asks people to go back to limiting contacts as much as possible and to apply this to New Year socialising too.