The UK government is considering even tougher restrictions to contain the new mutated variant of coronavirus. Its scientific advisers have warned that tougher rules will probably be needed.
In England at present more than 17 million people are under Tier 4 rules – the highest level – with people being told to stay at home and not leave the area.
Scotland is moving into its highest alert level 4 on Boxing Day and Northern Ireland will begin a lockdown on the same day.
Wales, where the NHS is under great pressure, has already entered a new national lockdown.
Huw Edwards presents BBC News at Ten reporting by health editor Hugh Pym and science editor David Shukman.
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