The late Eric Winter was quite q prolific songwriter, but sometimes amazingly shy about the product of his muse. For example, he wrote 'The Flowers of Manchester' to mourn the Manchester United crash in 1958, but published it anonymously. He also wrote the song that chills the blood of folkclub organisers === 'The Night That Nobody Came'.

More to the 'Charlie Mopps' point, Eric also loved adding verses to things. The one that sticks in my memory is a new last verse to 'John McCafferty':

So all you swaddies take advice from me,
Treat your arms drill a lot more seriously,
For if you do you might find that
You'll hit the bastard you were aiming at!

So it aint impossible that he added to somebody's version of 'Charlie Mopps', which, incidentally, I learned off aforementioned Redd Sullivan. Eric Winter wrote a handsome obituary for Redd in The Independent, which was followed up by The Guardian and The Times, no less.