I know whose it is - I don't think he's a member on here.
He does have a habit of forgetting things....recent bouts of forgetfulness include lack of gloves in Jugholes, and helmet down Watergrove Sough.
However, his biggest to date was forgetting to come along for trip down Great Masson!
I blame it on his recent marriage.
Seriously, Jim - if it's a size 11.5, keep hold of it and i'll put him in touch.