Each Alderney camp was named after one of the Frisian Islands: Lager Norderney located at Saye, Lager Helgoland at Platte Saline, Lager Sylt near the old telegraph tower at La Foulère and Lager Borkum, situated near the Impot. Two of these camps were the only Nazi concentration camps on British soil. The Borkum and Helgoland camps were "volunteer" labour camps and the labourers in those camps were treated harshly but better than the inmates at the Sylt and Norderney camps and were paid for work done. Lager Borkum was used for German technicians and volunteers from different countries of Europe. Lager Helgoland was filled with Russian Organisation Todt workers.
Lager Sylt
Today, little remains of the camp. Three gateposts to the rear of the island's airport mark the entrance; one has had a commemorative plaque attached. Some ruins remain, including a number of sentry posts, some foundations and a small tunnel, which led from the camp commandant's house to the inside of the camp. The commandant's house was later moved to another part of the island. It was built by the Organisation Todt in January 1942 by and for their forced labourers who would be employed in building fortifications including bunkers, gun emplacements, air-raid shelters and tunnels. Sylt camp held Jewish enforced labourers. The prisoners in Lager Sylt and Lager Norderney were slave labourers forced to build the many military fortifications and installations throughout Alderney. Norderney camp housed European and Russian enforced labourers. The Lager Sylt commandant, Karl Tietz, had a black French colonial as an under officer. Shocked to see a black man beating up white men from the camp, a German naval officer threatened to shoot him if he saw him doing it again. Tietz was brought before a court-martial in April 1943 and sentenced to 18 months penal servitude for the crime of selling cigarettes, watches and other valuables he had bought from Dutch OT workers on the black market. It was taken over by the Schutzstaffel – SS-Baubrigade I, which was first under supervision of the Sachsenhausen concentration camp; from mid-February 1943 it ran under the Neuengamme camp in northern Germany, located near the old telegraph tower at La Foulère. It was used by the Organisation Todt, a forced labour programme, to build bunkers, gun emplacements, air-raid shelters, and concrete fortifications on the island.
Post-war
Alderney has been nicknamed "the island of silence", because little is known about what occurred there during the occupation. The German officer left in charge of the facilities, Commandant Oberst Schwalm, burned the camps to the ground and destroyed all records connected with their use before the island was liberated by British forces on 16 May 1945. The German garrison on Alderney surrendered a week after the other Channel Islands, and was one of the last garrisons to surrender in Europe. The population were not allowed to start returning until December 1945. Over 700 of the OT workers are said to have lost their lives in Alderney, or in shipping that was sunk; the remaining inmates transferred to France in 1944. The States decline to commemorate the sites of the four labour camps. Local historianColin Partridge feels this may be due to the locals' desire to dissociate themselves from the accusations of collaboration. A faded memorial plate, tucked away behind the island's parish church, vaguely mentions 45 Soviet citizens who died on Alderney in 1940–1945, without saying how they died and why.