The whole programme is interesting, both about Wagner and as an example of how the holocaust casts a shadow over the reception of classical German culture by the BBC programme makers and audiences in the UK.
Sticking with Mrs Lasker-Wallfish, she was nineteen at the end of the war, so must be in her mid-eighties at the time of the above interview (around 2011?). She is author of a book, Inherit the Truth, variously subtitled "1939-1945, the documented experiences of a survivor of Auschwitz and Belsen" and "A Memoir of Survival and the Holocaust" (with a Preface by Martin Gilbert). I haven't seen this, though parts are available online. The blurb on Amazon says:
This autobiography relates the author's experiences, as well as those of her sister Renate, as a prisoner at both Auschwitz and Belsen. It tells how their lives were saved by courage, ingenuity, and several improbable strokes of luck. At Auschwitz, Anita escaped death through her talents as a cellist when she was co-opted onto the camp orchestra. The book contains a number of documents, most of them now lodged in the archives of the Imperial War Museum in London. There is a sequence of letters to her sister Marianne in England, from just before the War to 1942, when her parents were deported and liquidated. The predicament of Anita and Renate inside the concentration camps is conveyed, and the text shows how the sisters' capture while fleeing to Paris turned out to be a stroke of "luck" - they were sent to prison and thus spared the much worse horrors of Auschwitz for a crucial year in the middle of the War. This text featured in BBC Radio 4's "Desert Island Discs" programme on August 25, 1996, and in addition a BBC TV film was screened in October 1996.
The Preface claims she was saved by several "improbable strokes of luck". Her parents were deported and "never heard from again", but she and her sister both survived and emigrated to the UK in 1946 to join another sister who was already there and was an "ardent Zionist". She claims to have given evidence at a trial in Lüneberg in 1945 and public records (documents at the Public Records Office) of this and various personal correspondence survive. She refers honestly to revisionism in her introduction.
In the interview, she recalls some people being taken from an Auschwitz hospital on medical instructions, whilst she was told to stay because she played the cello - which admittedly is a non-medical reason. She doesn't contradict - or confirm - any of the remarks Fry makes from a believer perspective, though she puts a hand to her head when he mentions that Auschwitz was a "death camp". Fry states that some of his own relatives were "held and killed" in Auschwitz (in the voiceover, not in her presence).