Does this sound familiar?

[williamtheday]

I'm trying to find a movie made in Britain in early 1960s, I think it was black and white. All I can remember is a man in prison, his number is zero. He's in the yard with the other inmates and one is rambling about how reading Treasure Island as a boy corrupted his mind and made him kill his mother. Film then cuts to a woman opening the newspaper and fainting when she reads the headline "Zero to die to-day", apparently the man in prison's wife or girlfriend. This is pretty sketchy, I know. I may have seen it on TCM back in the 80s.

[j9ac9k]

I decided to test Microsoft's Co-Pilot AI on this so I entered your post and it came back with "Hell is a City" https://www.imdb.com/title/tt0053900/?ref_=ttls_li_tt Is that it?

[williamtheday]

Looks like a good movie, but I'm afraid it's not the one. Thanks though.