The Prime Minister will address the nation on Tuesday evening to outline new measures to tackle the sharp rise in coronavirus cases.
As well as the curfew, the hospitality sector will be restricted by law to table service only.
Mr Johnson will chair meetings of Cabinet and the Cobra emergency committee – including the leaders of Scotland, Wales and Northern Ireland – ahead of a live, televised address at 8pm.
The Prime Minister is expected to set out further ways the country can confront coronavirus in line with the scientific advice.
It comes after the UK’s four chief medical officers recommended raising the Covid alert level from three to four – the second highest – indicating the ‘epidemic is in general circulation; transmission is high or rising exponentially”.
And earlier on Monday, Sir Patrick Vallance – the chief scientific adviser – said the UK could see 50,000 Covid-19 cases a day by mid-October and a daily death toll of 200 or more a month later unless urgent action is taken.
A Number 10 spokesperson said: “No-one underestimates the challenges the new measures will pose to many individuals and businesses.
“We know this won’t be easy, but we must take further action to control the resurgence in cases of the virus and protect the NHS.”