Britain will on Monday set out plans to restart international travel, using a "traffic-light" system as the country cautiously emerges from lockdown.
This aligns with the UK’s announcement of May 17 as the tentative day for the relaunch of international travel.
Travel destinations will be ranked green, amber or red according to virus risk.
"We are doing everything we can to enable the reopening of our country... as safely as possible," Prime Minister Boris Johnson said.
The government said the new system "will help ensure the UK's vaccine progress isn't jeopardised and provide clear guidance for travellers".
People heading to low-risk "green" countries will simply take a virus test before and after they travel, the government said.
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But those going to amber or red countries will have to self-isolate or quarantine afterwards.
Currently people arriving in the UK from abroad are required to self-isolate for 10 days.
British nationals who arrive from a banned "red list" of high-risk countries face costly quarantine in government-approved hotels.
The government urged people not to book summer holidays, saying it was "too early to predict" which would be the green-lighted countries.
Agence France-Presse