Passengers entering England from dozens of countries including France and Spain will soon no longer have to quarantine.
These countries now pose ''a reduced risk'' from coronavirus, the government says.
However, each UK nation sets its own quarantine rules, so this only applies to England.
Where will I be able to go without quarantining? Travellers from more than 50 countries including France, Spain, Germany and Italy will no longer have to quarantine for two weeks when they enter England.
The full list of exempted countries will be published on Friday.
They will be categorised in a traffic light system, with travellers from low risk green and amber countries able to enter without restrictions.
The government will also lift its advice against all but essential international travel for selected countries from Saturday.
On 8 June, a two-week quarantine period was introduced for most people arriving in the UK.
The government said imported cases had become a more significant risk to public health.
This easing of restrictions could make it easier for those in England to go abroad on holiday, or see relatives.
It could also boost the tourism industry, which has been devastated by coronavirus and has opposed quarantine rules.
However, it is likely that Britons will still face restrictions - including quarantine - when they arrive in some other countries: Greece, a popular holiday destination with a low number of coronavirus deaths, says it will not accept direct UK flights until at least mid-July.
Austria requires Britons to self-isolate unless they have a recent medical certificate or test negative for coronavirus on arrival New Zealand has barred almost all foreign travellers from visiting Those entering Australia require a special exemption visa and face a mandatory quarantine.
However, the French government has suggested UK travellers will no longer have to go into voluntary quarantine there, once France is exempted from the UK rules.
What are the rules in other parts of the UK? Health measures like quarantine are set by each UK nation separately, so the changes may not apply everywhere.
The Scottish government says it has not made a decision on whether to ease quarantine restrictions.
The Welsh government has also not decided whether to follow England's measures Northern Ireland will still quarantine travellers arriving from outside the UK and the Republic of Ireland What happens if I travel to a country not on the list? Travellers entering or returning to the UK from a country not on the list are likely to have to quarantine for two weeks.
These classifications won't be set in stone - if coronavirus cases rise or fall in another country, they could be changed.
Equally, further restrictions may be placed on UK travellers if its infection rate rises.
What happened to air bridges? Ministers had indicated the government was considering a series of ''air bridge'' agreements.
These would allow people to travel between the UK and low-risk countries without having to quarantine at either end.
These were also referred to as ''travel corridors'' when including international journeys made via land and sea.
However, the government appears to have moved away from these partnerships, which could have posed problems in practice.
For example, Portugal was the first country to offer the UK an air bridge but has recently seen a rise in new coronavirus cases around Lisbon.