Thanks for the advice and web addresses people.
THis looks like an opportunity to buy an Irvine and not be accused of being a poseur
It seems that the population of the RAF are getting bigger as the surplus stores only seem to have the smaller sizes in stock at the moment. The downside of being a fairly tall salad dodger
A helmet will be a must as the sunroof on the back of my bonce will ensure maximum heat transfer to the environment