Here the PA news agency looks at the situation in nine countries:
7. Turkey
Turkey expects to welcome UK holidaymakers this summer even if they have not been vaccinated or taken a recent test. It will assess its plan for the summer after April 15.
8. Malta
Malta: Fully vaccinated UK travellers will be welcomed from June 1.
9. Mexico
Mexico: The country is open for international tourists and does not require them to be tested or vaccinated.