‘We climbed the stairs to the cells where the condemned were waiting. A German officer at the door leading to the corridor flung open the door and we filed past the row of faces and into the execution chamber. The officers stood at attention. Brigadier Paton-Walsh stood with his wristwatch raised. He gave me the signal, and a sigh of released breath was audible in the chamber, I walked into the corridor. ‘Irma Grese’, I called. T...