Like I said, “Wet Kitty”!Thank you for your input
I'm so very pleased and greatly relieved to say, this problem has been solved. But I will be looking to purchase a cone eventually as he will need one at some point, same said for my dog because he's needed one on several occasions.
My biggest problem is trying way too hard to avoid chemicals of any kind and I'm constantly being reminded that it's not always going to bennifit my animals...
In this case washing up liquid worked amazingly well, I mixed it with organic liquid soap, fresh lemon juice and bicarbonate. Rash or whatever this was has completely disappeared.
He'll be having another bath soon even if he tells me off then sits on my lap soaking wet .