Before you go you should check the requirements for visitors in the country you plan to travel to. Restrictions may be still be in place, for example, proof of vaccination, negative tests, quarantine and reasons for entry.
The Foreign, Commonwealth and Development Office (FCDO) provide general guidance for British people travelling abroad (on GOV.UK).
The FCDO also provide advice about travelling abroad, including the latest information on coronavirus, safety and security, entry requirements and travel warnings. This includes advice and information about entry requirements such as covid tests and isolation for countries that you intend to visit (on GOV.UK).
Carriers may have their own requirements for negative tests to allow boarding and travel.
The NHS COVID pass is available for people in Wales who have had two doses of vaccination and are travelling to a country that requires COVID vaccination proof.
If it is necessary to show a negative test before you can travel those must not be NHS tests instead you must book and pay for tests from a private test provider. .
You can also stay safe while you are away by following the same measures which help keep you safe while you are at home.