Prime Minister Boris Johnson announced on Saturday that some parts of England will move to Tier 4 amid a rapid spread of infection.
The government has attributed the rapid rise in infection to the spread of a new variant of COVID-19.
Mr Johnson announced tougher restrictions with “stay at home” alert level.
According to preliminary modelling data, the new and Emerging Respiratory Virus Threat Advisory Group (NERVTAG) believes that the new virus can spread quickly and could increase R by 0.4 or more.
The government said it will continue to analyze new and existing data in order to learn more about the variant.
The new Tier 4 order to affects Kent, Berkshire, Buckinghamshire, Surrey (excluding Waverley), Portsmouth, Hastings, Rother, Gosport, London (all 32 boroughs and the City of London); East of London – Central Bedford, Bedford, Milton Keynes, Luton, Hertfordshire, Essex (not including Colchester, Uttlesford and Tendering, Peterborough).
What to Expect In Tier 4:
It is a stay a “Stay At Home” order except, as usual, key workers will be allowed to go to work if they cannot work from home, people can travel for education or childcare purpose and can take a walk for the purpose of exercising.
This time, there is no travelling to Tier 4 areas and tier 4 residents cannot stay overnight away from home.
Gym, swimming pools, cinemas, casinos and bowling alleys, nail bars, barbers and hairdresser must remain close.
The new order also allows one person to meet with another person in an outside public space but support bubbles and child base bubbles will remain unchanged and communal worship is also allowed to continue.
Vulnerable people – those clinically extremely vulnerable, people suffering from certain types of cancer, immunosuppression therapy and those with the severe respiratory condition must limit outdoor and should not go to work.
Prime Minister said during his 4 pm press conference at Downing Street that there is no current evidence to suggest the new variant causes a higher mortality rate, or whether it affects vaccines and treatment but evade testing.
As for Christmas, bubbles can continue with up to three households but this will be only on Christmas Day as against the five days order.
The government also said that there are more cases of the new variant in Tier 4 but warned that it is present at lower levels around the country.
Mr Johnson also warned that those living in Tier 1, 2 and 3 areas must not travel to Tier 4 and those in Tier 4 are banned from travelling abroad except it relates to work and education.
The new Tier will be reviewed on 30 December.