Hi Rob,
Welcome to rootschat! Thank you for your imput. I know most of the names you mentioned from my brother. He was apprentice fitter there from 1965 til 197l. I can't give you names on here, but when you have made 3 posts altogether (I think it is) I can send you a personal message and give you my brother's name incase you might remember him.
I have found out quite a lot about Peter Sheffield and also found his grave, which is in the cemetery just off Humberstone Avenue. I went there to see it some time ago now. My brother is also in touch with someone else who lives in Cleethorpes, who worked at Peter Sheffields when he did.
Everyone says what a lovely man Peter was. I didn't know about the Burma Star, I wonder if my brother does, I will be speaking to him on Sunday. He lives in Scotland now. Peter's wife is still alive I believe. My brother had some contact with her a couple of years ago now. She still lives in the same house!