The poignant images, most of which were taken in 1945, show the starving and desperate faces (bottom left inset) of Adolf Hitler's victims at concentration camps such as Auschwitz and Dachau. In one photograph, an emaciated 18-year-old Russian prisoner (left) stares into the camera during the liberation of Dachau concentration camp in 1945, her face hollow from hunger. The collection was released to mark the International Holocaust Day, which is held on January 27 every year - the day that Auschwitz-Birkenau was liberated by Soviet troops in 1945. A newly colourised photograph in the collection shows a group of young children, all of whom were wearing the blue striped prisoner uniforms, peering out at the Soviet troops through a barbed wire fence at Auschwitz when it was liberated (top right). Some 200,000 children were murdered at the Nazi death camp, and just 700 youngsters remained alive when the Red Army arrived on January 27, 1945. Another photograph shows a young woman (bottom right), whose face is covered with scars and plasters as a result of a beating by the SS guards. But despite being unable to open her eyes fully from the swelling, she is smiling as she was photographed two days after the British military entered the Bergen-Belsen concentration camp in April 1945.