LONDON -- The British government on Friday announced a "first tentative step" toward resuming international travel, saying U.K. citizens will be able to travel to countries including Portugal, Iceland and Israel later this month without having to quarantine on their return.

Transport Secretary Grant Shapps said the country’s current blanket ban on overseas vacations is being replaced by a traffic-light system classifying countries as low, medium or high risk.

The "green list" of 12 low-risk territories also includes Gibraltar, the Faroe Islands and the Falkland Islands — but not major vacation destinations for Britons such as France, Spain and Greece. Britons traveling to those countries, including Canada, will have to self-isolate for 10 days upon their return.

All but essential travel remains barred to countries with severe outbreaks, including India and South Africa, and people returning from them face 10 days of mandatory hotel quarantine. On Friday the government added Nepal, the Maldives and Turkey to that list.

Friday’s decision throws into doubt fans’ ability to travel to the Champions League soccer final between two English teams — Manchester City and Chelsea — which is due to be played in Istanbul on May 29.

The changes take effect May 17, the next date on the government’s roadmap out of lockdown. Pubs and restaurants in England can reopen indoor areas that same day, and venues including theaters and cinemas can open to limited audiences.