BBC News
By Paul Adams
image copyrightMoD
When UK government ministers pledged to inoculate all British adults by the autumn, they may not have been thinking about people living in some of the world's most remote places.
And yet, since early January, by plane, ship and - in one case - supermarket freezer truck, that's exactly what's been happening.
Officials say 250,000 vaccine doses have already been administered to adults in 11 of the 14 British Overseas Territories.
Some of those places, like Gibraltar, Bermuda and the Cayman Islands, are easy to reach.
Others require epic journeys.
A mission to supply the 200 citizens of the gloriously named Edinburgh of the Seven Seas, on the volcanic island of Tristan da Cunha, was a case in point.