Geeram,
As Peter will bear out, the Police did some strange things when the "Powers at Be" thought they should be more than they were.
I am going to speak from both sides of the fence.
If you have been there, you will instantly recognise in the new breed of Police Firearms Officers, whether they were in the Military before hand, when you watch them on TV at major incidents such as we have all seen recently in London.

Its a strange thing, but you will recognise those who are wary of their opponents before rushing in, and there will be those who perhaps haven't seen an agree man with a firearm before, or an explosive trigger in his hand!!
For the Small Arms School to be "forced" into training Police Officers in the art of sniping in those early days of the Enforcer, I would hazard a guess it was hard. As you don't know who you are getting, where in the Army, the first prerequisite was, you had to be able to shoot, and well, and your unit documents would state that, and also you would have attended a selection cadre before hand.
None of these were given to Warminster. They expected a Police Officer could shoot and shoot well. Sadly, the service "Shot themselves in the foot" there!!!