"...bring on the revolution!" – theleveller.

I take it therefore leveller that your son, the member of a police ARU is looking forward to this revolution as keenly as you appear to be, because believe me irrespective of what your views on guns for any reason are, in this revolution at one point or other they will be used - and your son, with his gun, will have to respond. Perhaps the "clowns" detained in Plymouth were intent on travelling to the G20 to provoke just such an incident.