Cheers Guys.

The hat in question is a top notch Shoei I bought four years ago. It was bought with the idea of doing track days, which I never did. I use it about half a dozen time a year for long journeys and it is stored in it's bag in a cool dark cupboard. The lining and polystyrene are still mint condition.

I'd rather wear that hat that a school hat which may not be a perfect fit.

My question was related to being able to use it. I was under the (mistaken) impression that to do track work I needed a ACU gold certified hat. I wondered if mine was still in ticket.