The evidence at Alderney included mass graves and remains of some of the buildings now buried underground They were the only Nazi concentration camps to be built on British soil.The facilities began as labour camps, but two were turned into actual concentration camps under the SS.Caroline, who has previously carried out research on the site of the Treblinka camp in Poland, said: “Numerous prisoners mentioned that the conditions on Alderney were worse than they experienced elsewhere, including those incarcerated in notorious concentration camps across Europe.Kevin said: “We now know much about the camp system – which included two concentration camps...