Travellers arriving in the UK from dozens of countries no longer have to self-isolate for two weeks from Friday.
The rules are being relaxed for arrivals from 75 countries and British overseas territories.
However, Scotland still requires people travelling from Spain to quarantine – unlike England, Wales and Northern Ireland.
The Foreign Office’s advice against taking a cruise holiday remains in place.
From Friday morning, people arriving in the UK from France, Italy, Belgium, Germany and dozens of other countries will no longer have to spend 14 days in quarantine.
But people who arrived from those countries at an earlier point in the last two weeks will still be expected to complete their period of isolation, the government said.
On Friday, the UK government changed its advice for Serbia, no longer allowing travellers to return without quarantining.
Scotland, which from Friday has also made face coverings mandatory in shops, has said it will continue to quarantine passengers from countries with a higher prevalence of Covid-19 than its own.
It means people arriving in Scotland from Spain will still face quarantine rules. The Scottish government said data from the UK government showed the prevalence of the virus in Spain is 330 people per 100,000, compared with 28 people per 100,000 in Scotland