Boris Johnson televised Coronavirus update (04/01/2021)
Any new measures would tackle the rise in cases, "protect the NHS and save lives", Downing Street said.
It comes as Scotland announced a legal requirement to stay at home from midnight, with schools to be closed.
The House of Commons will also be recalled, allowing MPs to vote on any new measures on Wednesday.
Mr Johnson will set out plans for England as the UK's devolved nations have the power to set their own coronavirus regulations.
Alongside Scotland, both Wales and Northern Ireland have also implemented national restrictions.
The PM earlier said there was "no question" the government would announce stricter measures to prevent the spread of coronavirus.
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