It's basically some old guy's autobiography.
Here's a link to one of the chapters covering his experiences in the 1960's:
https://www.coughtrey.me.uk/more%20rats.htm
It's best to read this chapter from the start to get the full context.
I don't know whether he's making up what happened to him but if it's actually true then I would have LOVED to be in that position!!
I'm sorry for not mentioning it earlier, I'd forgotten all about it
