Watch: Quarantine Hotels Introduced for ‘Red List’ Arrivals to UK
On Thursday, Transport Secretary Grant Shapps added more to the list, including the United Arab Emirates, which covers Dubai, Burundi and Rwanda.
Prime Minister Boris Johnson told the Commons that passengers returning from those countries will be “met at the airport and transported directly into quarantine”.
Passengers will also be required to fill in a form explaining why their trip is necessary, with enforcement stepped up at airports to prevent leisure travel.
Here is the full list of 33 countries:
Hotel quarantine list
Democratic Republic of Congo
Portugal (including Madeira and the Azores)
United Arab Emirates
The cost of staying in one of these hotels has not been disclosed, but further details will be released next week.
Setting out more details of the measures, Home Secretary Priti Patel said: "Despite the stay-at-home regulations we are still seeing people not complying with these rules.
"The rules are clear, people should be staying at home unless they have a valid reason to leave.
"Going on holiday is not a valid reason, so we will introduce a new requirement so that people wishing to travel must first make a declaration as to why they need to travel.
"This reason for travel will be checked by carriers prior to departure."
Travel operators are expected to face fines if they fail to inspect these forms.
Watch: What you can’t and can't do during England's third national lockdown