Plan B - Government Omicron Covid-19 Variant Guidelines
What are the new measures for England?
From Friday 10 December, face coverings are mandatory for most indoor public venues including places of worship, theatres and cinemas - as well as on public transport and in places like shops and hairdressers.
Masks won't be needed in pubs or restaurants, nor in venues like gyms where it's "not practical to wear them".
From Monday 13 December, people should work from home "if they can".
From Wednesday 15 December (subject to parliamentary approval), people will need an NHS Covid Pass - showing their vaccination status or a recent negative lateral flow test - to gain entry to:
Nightclubs
Indoor unseated venues with more than 500 people
Unseated outdoor venues with more than 4,000 people
Any venue with more than 10,000 people
The government also wants people to do a lateral flow test (LFT) before entering "a high-risk setting" - such as a crowded place - "involving people you wouldn't normally come into contact with, or when visiting a vulnerable person".
Ministers also intend to change rules so contacts of confirmed Omicron cases can do daily Covid tests instead of the recently-introduced mandatory 10-day self-isolation period.