Hopeful holidaymakers are being advised to book with caution as borders reopen for the first time this year - including since Britain walked away from the European Union.
Prime Minister Boris Johnson's new traffic light system came into force this week - determining what restrictions passengers must now face as they travel abroad this summer.
Under the system, green list passengers won’t need to self-isolate on their return. Destinations on this list include Portugal, Iceland and Israel.
Passengers who visit ‘green’ countries - considered the safest based on Covid infection rates and vaccination targets - will require a pre-departure test and a PCR test on day two, however they won't have to quarantine.
Those vising 'amber' destinations, which is largely the rest of the world, will require a pre-departure test, PCR tests on days two and eight and self-isolation at home for 10 days.
Those vising red list countries will require a pre-departure test, followed by mandatory hotel quarantine for 10 days, as well PCR tests on days two and eight.

And there are some warnings for holidaymakers who are now hoping to book their trip.
Most insurers have warned that policies will not cover cancellations due to changes in government guidance and so people are being urged to aim for flexibility when locking in a break.
Speaking on a one-off special of the ITV Money Show on Tuesday, Martin Lewis said bookers should aim for flexible deals and compare package breaks where possible as these are covered by Package Travel Regulations laws that guarantee a refund.
It’s also important that you book using the right card.
"Flexible booking protection may be useless if the firm goes bust so pay on your credit card,” Martin said.
“That means you get Section 75 protection, as long as you spend £100 (or up to £30,000) on the card.”
Under Section 75, you will get extra protection if you don’t get what you paid for or are let down by the travel company.
However, there are two warnings – if you’re booking via an agent, check Section 75 still applies and make sure any debts you take out on plastic are repaid in full each month.
If you've booked on a debit card, speak to your lender about 'chargeback'. This is similar to Section 75 although only available at the discretion of banks.
What about insurance and passports?
Some insurers will cover cancellations if you are diagnosed with Covid before you travel or have to suddenly self-isolate however make sure you check the small print with your provider.
If you have an EHIC card or one that has expired, it's important that you renew it for a new global one as Britain is now no longer part of the EU.
Lastly, Lewis warned that people should be mindful of new Brexit rules as the skies open for the first time since Britain walked away from the EU on January 1.
To travel to Europe, you now need at least six months left on your passport.