From Tuesday (November 30) the government has brought in new measures to help reduce the spread of the new Omicron Covid variant.
These measures include reintroducing mask wearing, social isolation and a ramped-up booster vaccine programme.
Face masks haven't been a legal requirement since Freedom Day in July.
But the new rules will see them be legally mandated in some settings in England.
Read more: Greater Manchester's Covid-19 'blackspots' as Omicron variant hits UK
So, where are all the places you must now wear a face mask?
According to the government, face coverings must now be worn in shops and shopping centres, in transport hubs and on public transport.
You should still continue wearing a face mask in other indoor spaces which are crowded and enclosed, where you 'may come into contact with other people you do not normally meet' - even if a face covering isn't legally required.
Some people, including children under 11, are exempt from having to wear face coverings in any setting.
Anyone with a health condition or disability, which means they cannot wear a face covering, has a reasonable excuse for not wearing a face covering.
The complete list of where you must wear a face covering by law - unless you are exempt or have a reasonable excuse - is:
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shops, supermarkets and shopping centres
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auction houses
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post offices, banks, building societies, high street solicitors and accountants, credit unions, short-term loan providers, savings clubs and money service businesses
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estate and letting agents
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premises providing personal care and beauty treatments (barbers, hair salons, tattoo and piercing studios, nail salons and massage centres)
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pharmacies
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premises providing veterinary services
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retail galleries
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retail travel agents
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takeaways without space for consumption of food or drink on premises
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public transport (aeroplanes, trains, trams, buses, coaches and ferries), taxis and private hire vehicles
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any car or small van during a professionally delivered driving lesson, a practical driving test, or during one of the practical tests for giving driving instruction, and in all HGV lessons and tests
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transport hubs (airports, rail and tram stations and terminals, maritime ports and terminals, bus and coach stations and terminals)
The police and police community support officers can enforce compliance if members of the public do not comply with this law without a reasonable excuse.
Transport operators can deny access to their public transport services, or direct someone to wear a face covering or to leave a service, if not wearing one without a legitimate reason.
Local authority enforcement officers can also use their enforcement powers against businesses for failing to display appropriate signage or breaching the prohibition against preventing someone from wearing a face covering.