As nature gradually swallows up the crumbling concrete walls of a little-known Nazi concentration camp built on a British island, ... "So, undoubtedly, if you wanted to put a pin on the map, ...

Yes, on British soil was built Lager Sylt, which was taken over by the SS. A branch of the Neuengamme complex near Hamburg, its Auschwitz-like huts lay on the edge of the island’s airport.