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Seventy years ago, British and Canadian troops arrived at the gates of the Bergen-Belsen concentration camp in northern Germany.

It was the first camp to be liberated by British forces. Until then the only accounts of conditions in the camps had come from those entered by the Red Army in Poland.

What the Allied soldiers - and the ´óÏó´«Ã½'s Richard Dimbleby - saw at Belsen would haunt them, and provide searing images of the Holocaust: corpses piled up, many thousands of sick and starving prisoners.

Gena Turgel is now 92, but has vivid memories of April 1945.

Born in Poland, she narrowly escaped being gassed in Auschwitz and arrived in Belsen after a death march across Europe, and told Mishal Husain of her experiences in the "finishing camp".