I'm interested in this too! As I need to replace my hat as it is prehistoric AND I've fallen off in it (but didn't replace it, oohhhh the shame!!) and the only hat that fits my odd-shaped bonce is a kids one!! Cheaper though..........
Can't see any reason why they wouldn't be accepted, as long as they meet the standard, if they didn't have the ponies on the inside they'd be the "grown-up" version!
Fab, this is what i wanted to hear, i only replaced my hat in the summer, however, i have entered my first event and pretty sure they will be tagging hats, a fellow livery said that she wasn't allowed to compete in her junior hat years ago? so was a little concerned that this was going to be a very expensive first event