The Government has confirmed that fully vaccinated Britons will be able to visit both green and amber-listed countries without the need to quarantine on return from July 19.
Non-vaccinated travellers, or those who have had just one dose, will still need to quarantine for up to 10 days on returning from an amber country.
The traffic light system will remain as is, with green, amber and red countries reviewed every three weeks.
Some 14 new countries and territories were added to the green watch list last month.
However, all these destinations – except Malta – will be placed on the green watch list, meaning that they are “most at risk” of turning amber.
The destinations that moved over from the amber list were: Malta; Anguilla; Antigua and; Barbuda; Balearic Islands; Barbados; Bermuda; British Antarctic territory; British Virgin Islands; Cayman Islands; Dominica; Grenada; Madeira; Montserrat; Pitcairn Islands; Turks and Caicos.
Israel will also be placed the on the green watch list.
Meanwhile, six countries moved to the red list. They include: Uganda; Tunisia; Eritrea; Haiti; Dominican Republic; Mongolia. Anyone returning from these destinations is required to quarantine in a Government-approved hotel for 10 days at a cost of up to £1,750 per person.
Portugal was the first destination to move from green to amber, following the initial review of the green list on June 3.
The Government has also said it is lifting its blanket recommendation that people should not travel to amber countries although the Foreign Office may still advise against non-essential trips to some of the 140-plus destinations on the amber list.
The rating of each country is decided based on the proportion of its population that has been vaccinated, its infection rates, the prevalence of variants of concern and its capacity to sequence their genomes.
As for staycations, holidays in England, Wales and Scotland are back on, as is cross-border travel.
Hotels and self-catering accommodation were permitted to open, along with indoor hospitality, on May 17. Travellers in Northern Ireland are still subject to local rules.