Matt Hancock has told the House of Commons that Portsmouth, Peterborough, Bedfordshire and Berkshire, are among the regions to be placed in the toughest tier 3 coronavirus restrictions from Saturday, moving up from tier 2.

This week has already seen London, parts of Essex and Hertfordshire all placed into tier 3 on Wednesday, as the Covid-19 infection rate in the capital was reported to be the highest in England.

Mr Hancock described the new allocations as “absolutely essential, not just to keep people safe but because we’ve seen that early action can help prevent more damaging and longer-lasting problems later”.

The three tier system is currently being updated on a fortnightly basis, and is being reviewed based on coronavirus case numbers, the local rate of infection, and hospital admissions.

People can find out which alert level their area falls under using the postcode search available on the government website. You can also refer to a full list here. The NHS Covid 19 app will also be updated and show which local alert level applies in which area.

Here’s everything you need to know about what you can and cannot do in tier 3.

If a region has been placed in tier 3, or under “very high” alert, this means that it is an area “where transmission rates are causing the greatest concern”, the government states.

“This includes incidence and test positivity, including amongst older and more at-risk age groups, as well as the growth rate, hospital admissions and other factors,” the government’s website adds.

In areas placed under “very high” alert, the government will outline a “baseline of measures” for members of the public to follow, in addition to working with local authorities to decide what “additional measures” are required.

When it comes to socialising, people in tier-3 areas are not allowed to mix with different households indoors or outdoors, unless it is in a public space such as a park. 

The government website says: “You must not socialise in a group of more than six in some other outdoor public spaces, including parks, beaches, countryside accessible to the public, a public garden, grounds of a heritage site or castle, or a sports facility – this is called the ‘rule of 6’.

“You must not meet socially indoors or in most outdoor places with anybody you do not live with, or who is not in your support bubble, this includes in any private garden or at most outdoor venues.”

Hospitality venues, including bars, pubs, cafes and restaurants, must close except for takeaway, delivery, and click and collect services.

There are some exemptions to this, including cafes and canteens at hospitals and those at schools and higher education accommodation.

The government guidance on non-essential shops says: “Indoor shops, through-ways and public toilets at such attractions can remain open.”

This means clothes shops, toy shops, and others that might be on your list in the run up to Christmas.

Members of the public are being advised by the government to refrain from travelling in or out of tier-3 areas to prevent further transmission of Covid-19.

The government states: "Avoid travelling out of the area, other than where necessary such as for work, education, youth services, medical attention or because of caring responsibilities.”

For these reasons, accommodation such as hotels, B&Bs, campsites, and guest houses must close. 

However, there are several exemptions, such as for those who use these venues as their main residence, and those requiring the venues where it is reasonably necessary for work or education and training.

But the transport secretary, Grant Shapps, has said that tier 3 residents would still be able to go abroad and the government has confirmed that there will be no legal impediment to travelling on holiday from anywhere in England – subject to outbound and inbound rules.

Weddings and funerals can continue to go ahead, but there are restrictions on the number of guests.

Up to 15 people can attend wedding ceremonies, however, unlike in tiers 1 and 2, receptions are not permitted.

As for funerals, 30 people can attend.

All indoor entertainment and tourist venues must close in tier 3.

This includes cinemas, theatres, concert halls, museums, galleries and bowling alleys.

Leisure and sports facilities may stay open in tier 3 along with places of worship and public buildings such as libraries and community centres.

Additionally, personal care and close contact services can stay open. This includes hairdressers and barbers, beauty salons, and tattoo parlours.

If you break the restrictions, you can be fined £200 for the first offence, doubling for each further offence up to a maximum of £6,400.

If you hold, or are involved in holding, an illegal gathering of over 30 people, the police can issue fines of £10,000.

You can read more about the three alert levels on the government website here.