UK residents visiting the Channel Islands must ensure they have adequate travel insurance from 1 April.
The recommendation comes from the Department of Health as the healthcare arrangements for UK visitors to the Islands are due to change.
The current agreement, which allowed UK travellers to get a limited number of medical treatments in the Channel Islands free of charge, will end on March 31.
Anyone travelling to the Islands, which include Guernsey, Jersey, Alderney, Sark and Herm, will be required to pay for medical treatment should they become ill or injured there after this date. Visitors should therefore take out adequate insurance before they travel.
Visitors from the Channel Islands to the UK will also now be liable for charges for medical treatment when visiting the UK, so they should also have health insurance cover.