BBC Radio 4 has this too:
Unspeakable: Survival and Transformation After Trauma by Dr Gwen Adshead and Eileen Horne
I'd agree with treadigraph and DVDT's find, these are based on a book and likely to be composite/modified accounts to anonymise them preserving the essential facts on distress and trauma. The issue here is organisations not making that clear when they present abridged sections of the book. Worth some caution on avoiding libellous comments. The author's description from Faber and Faber:
Dr Gwen Adshead trained at St George’s Hospital, the Institute of Psychiatry and the Institute of Group Analysis. She has worked as a forensic psychiatrist and psychotherapist in the NHS for nearly three decades, within prisons, at secure hospitals including Broadmoor, and in the community. She has published over one hundred academic works; she holds an MA in Medical Law and Ethics as well as an honorary doctorate from St George’s Hospital Medical School and has lectured widely, including as a visiting professor at Yale and as the Gresham College Professor of Psychiatry. In 2013, she was honoured with the Royal College of Psychiatry’s President’s Medal. She is the co-author of the Sunday Times bestseller The Devil You Know: Encounters in Forensic Psychiatry.