International travellers could be fined £1,000 if they fail to self-isolate for 14 days on arrival in the UK, the government is expected to announce.
Under the plans, health officials would be able to carry out spot checks at private addresses to check whether people were complying.
Home Secretary Priti Patel is expected to outline the measures at the Downing Street coronavirus briefing later.
The new rules are not expected to come into force until next month.
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- As part of the plans, which are aimed at guarding against a second wave of coronavirus infections, all arrivals would be asked to fill in a form with their contact information.
Road hauliers and medical officials would be exempt, as well as those arriving from the Republic of Ireland.
However, people travelling from France will not be exempt, the government has previously confirmed, after it was initially suggested otherwise.
Any passengers arriving in the UK by plane, ferry or train would need to provide UK Border Force officials with an address where they will self-isolate, otherwise accommodation will be arranged by the government.
Airlines have already warned quarantine measures could make an already critical situation worse for them, as air travel has plummeted by as much as 99% due to the pandemic.
Earlier this week, Ryanair boss Michael O’Leary described the plan to quarantine travellers as “idiotic” and “unimplementable”, while trade body Airlines UK said it “would effectively kill” international travel to and from Britain.
Number 10 previously said the measure would be reviewed every three weeks once it is introduced.
The government currently recommends international travel only when absolutely necessary, and nobody should travel if they display any coronavirus symptoms.
- On Thursday, easyJet said it will resume some flights on 15 June, with all passengers and cabin crew told to wear face masks.
The initial schedule will include domestic routes across the UK and France.