Royal Navy and RAF combine efforts to deliver vaccines to world’s most remote Overseas Territory UK Armed Forces have transported coronavirus vaccines to the Overseas Territory of Tristan da Cunha – the most remote inhabited island in the world. From: HMS FORTH travels to Tristan da Cunha to deliver coronavirus vaccines. MOD Crown Copyright. For the first time, the Royal Navy assisted the RAF and Strategic Command in a 6-day operation this month to the isolated South Atlantic island community. An RAF Voyager aircraft made the 8,000 mile trip from RAF Brize Norton to the Falkland Islands, via Dakar in Senegal to refuel, before HMS Forth sailed the 2,000 mile voyage to Tristan da Cunha.