"If there is an "event" the bench is likely to take the view that use of a firearm is not reasonable self defence."
In theory a private citizen has exactly the same rights as CO19 with respect to use (Police have possession exemptions, but nothing else) in self defense or defense of others. So if CO19 are allowed to shoot someone they suspect to be armed then so is anyone else.
In practice you are absolutely correct.
Biting the hand that feeds IT
