Travellers to the UK could have to quarantine in hotels after the government confirmed they were "actively" working on the idea.
Prime Minister Boris Johnson said the Government was "definitely looking at" the possibility of travellers arriving in the UK being required to quarantine in hotels.
Mr Johnson said he wanted to make sure the UK population was protected from new variants coming into the country, that could be resistant to the vaccine.
New Zealand, Australia and Thailand are just some of the countries that have introduced the measure, with travellers having to pay thousands of pounds to quarantine in a hotel before entering those countries.
Mr Johnson said: "We have to realise there is at least the theoretical risk of a new variant that is a vaccine-busting variant coming in, we've got to be able to keep that under control."
Mr Johnson went on: "With this vaccination programme, we've done I think 6.3, 6.4 million people now in the UK as a whole.
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"We are on target just, just, we're on target to hit our ambition of vaccinating everybody in those vulnerable groups by the middle of February.
"We want to make sure that we protect our population, protect this country against reinfection from abroad.
"That idea of looking at hotels is certainly one thing we're actively now working on.
"We need a solution that gives us the maximum possible protection against reinfection from abroad."
The Telegraph reports that Priti Patel, the Home Secretary, and the Health Secretary Matt Hancock are understood to be pushing for a mandatory quarantine in Government-approved accommodation for all arrivals.
