While I was at Warminster I was asked to arbitrate on a couple of things, really to do with definitions. Cup dischargers was one and another was a DeLisle EXTREMELY well made/converted from a dewat/deactivated No1 rifle. Still deact BUT had the tampering interfered with the original deactivation (it had, marginally) and increased its ability to fire a shot. bullet or other like missile (it hadn't) or improved the 'so reduced as to be incapable of withstanding the blah blah blah...'. It hadn't so everyone was happy and the original (but lost certificate) certification still held good.

Another was another of those superb jobs by a reenactor who converted an early spec. Mk2 Sten into a Mk5. Initially they seemed to be champing at the bit for a prosecution but to be fair, they did listen as in this case nothing .................. Anyway. But at least they took advice. I seem to remember that just to emphasise the point we had a morning on the range with some Sten guns. Well, you have to don't you?