Estonia and Latvia have been removed from the UK's travel corridors, meaning Brits who return after 4am on Saturday 28th November will need to isolate for 14 days.
The decision comes following concerns over rising numbers of coronavirus cases in both countries.
Meanwhile, Bhutan, Timor-Leste, Mongolia, Aruba and the Pacific Islands of Samoa, Kiribati, Micronesia, Tonga, Vanuatu and the Solomon Islands have been added, meaning that Brits won't need to quarantine when they return.
The news comes as the government prepares to lift its ban on international travel when England's lockdown ends on Wednesday 2nd December.
Although travel corridors and travel advice are not the same thing, usually when a country is removed/added from the travel corridors, the FCDO updates its advice accordingly. (So in the case of Estonia and Latvia, it's likely that advice will be changed to be against non-essential travel). If you have a trip booked, we have a guide on what happens now.

Secretary of State for Transport Grant Shapps took to his Twitter page to share the latest updates.
"Travel Corridor: BHUTAN, TIMOR-LESTE, MONGOLIA, ARUBA, the following PACIFIC ISLANDS: SAMOA, KIRIBATI, MICRONESIA, TONGA, VANUATA and SOLOMAN ISLANDS have been ADDED to the #TravelCorridor list. If you arrive from these places after 4am Sat 28 Nov you do NOT need to self-isolate
"Latest data means we must remove ESTONIA and LATVIA from the #TravelCorridor list. From 4am Saturday 28th November, if you arrive into the UK from these destinations you will need to self-isolate."
Shapps also revealed that the travel ban on Denmark was being lifted, but the country would remain off the travel corridors list.


Earlier this week the government confirmed that holidaymakers returning from coronavirus hotspots can free themselves early from quarantine by paying to take a test.
From December 15, people arriving in England from countries not on the travel corridor exemption list can opt to take a test after five days of self-isolation. If it comes back negative, they can be released.
Without a test, returning from a country not on the travel corridor exemption list will mean the usual 14 days in quarantine.
There are countries where you currently don't need to quarantine when returning although it's worth noting some will require you to provide proof of a negative Covid-19 test, or in some cases quarantine when you get there.