The Caribbean islands included are Anguilla, Antigua and Barbuda, Barbados, British Virgin Islands, Cayman Islands, Dominica, Grenada, Montserrat, and the Turks and Caicos Islands.
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While the destinations on each list can change at short notice, here are the full list of countries on each list.
If you travel to a country against government advice, this could invalidate your insurance.
The rule also applies to tourists.
If returning to Wales from a green or amber list destination, children under 5 do not need to get tested.