This is a lovely story
The kid may not get a royalty, but by goodness it's a great opener for every interview he goes to hereafter. 'Have you brought any samples of your work?' 'Why actually, dig in your pocket'.
Overdue, I see so many hooky £1 coins and just pass 'em along as people losing faith in the currency is a bigger problem than one coin from every 40 being a pup.