The UK's green, amber and red list could change this week with some countries at higher risk of being moved in the latest traffic light update.
Croatia and Madeira could be taken off the green list and moved to amber this week in a huge holiday blow to UK holidaymakers.
Jamaica, Morocco, Dominica and St Lucia could also be put on the red list at the next government travel update expected this week.
It is also predicted that Antigua and Turks and Caicos could turn amber, according to analysis by travel expert Paul Charles from The PC Agency.
If Croatia and Madeira turn amber, it could spell disaster for holidaymakers as both green list countries have been welcoming both vaccinated and unvaccinated travellers.
Germany, Norway, Poland, Bhutan, the Czech Republic, Hungary and Saudi Arabia could be tipped to go on the green list, according to reports.

The current traffic rules are:
- Green list: No self-isolation or quarantine when you return to the UK, although you will need to take a PCR test on day two.
- Amber list: You'll need to self-isolate at home for 10 days, and take PCR tests on days two and eight. However, those who are fully vaccinated can swerve the self-isolation.
- Red list: You'll need to stay in a quarantine hotel for at least 10 days. Holidaymakers need to fork out the cost themselves which is over £2,000.
For those with a Spain holiday booked, the good news is that the country could likely remain on the amber list.
Changes to the UK's travel lists are announced roughly every three weeks, and it's expected that the newest update could be revealed on Wednesday or Thursday.
The last review, which was carried out on Wednesday 4 August, saw the likes of Germany, Austria and Norway move from the amber list to the green list.
However it's worth noting that just because the UK government says you can visit a country doesn't mean you can automatically go on holiday.
Only a handful of countries are actually open to Brits currently due to the ongoing pandemic - but there are some holiday options at the time of writing.
For example, Austria, Gibraltar, Latvia and Slovenia are some of the countries that could remain on the green list, and they welcome both vaccinated and unvaccinated travellers.
For example, Thailand has begun a phased approach for the return of tourists.
Back in July, popular holiday spot Phuket reopened to vaccinated tourists, with plans to potentially reopen the whole country in October to those who are double jabbed.
However, in some cases travel is unlikely to resume until next year.
New Zealand and Australia have both announced plans to welcome back tourists from 2022, depending on their own vaccine rollouts and the global situation.