In 1942, Lale Sokolov arrived in Auschwitz-Birkenau. He was given the job of tattooing the prisoners marked for survival - scratching numbers into his fellow victims' arms in indelible ink to create what would become one of the most potent symbols of the Holocaust. Waiting in line to be tattooed, terrified and shaking, was a young girl. For Lale - a dandy, a jack-the-lad, a bit of a chancer …