It is worth watching the BBC 'Who do you think you are' documentary about his genealogy. He talks movingly about his violent father's war trauma and how it affected the whole family.

https://www.bbc.co.uk/programmes/b01mfw63

(not sure if it is regionally restricted) also:

https://www.youtube.com/playlist?list=PLZsy4Rj7uAiT2NL8RIgH0...