Policemen or women,are human beings and are like us,but unlike us they have an official badge,a service weapon,etc and are always on duty,even though they might not be working.Now even in my country,you get pro and anti-gun cops and they also have their own shooting club,which is a 'closed shop',to anyone,other than cops,both retired and serving.
In order to make gun ownership harder,because they don't like them,Police departments in the UK have recruited anti-gunners for jobs that would otherwise,suit pro-gun or ex-military types.These include,Armed Response/Tactical Firearms,Flying Squad or Robbery Squad or those qualified to use firearms,in CID departments.CID,means Criminal Investigation Department and are regular and non-specialist detectives.
So over here,If a cop is a member of the police gun club,they might not be considered for a firearms-related job such as,being in charge of a licensing department or specialist firearms units.This reason is that,if they are a member of the UK NRA,then it can be seen as corruption,between them and the firearm owner or that they can be too 'trigger-happy' and 'Rambo-like'.
This is why you can get anti-gunners,who serve on firearms licensing departments and on firearm boards.
But again,there's always corruption and 'hand shakes' and so it was suspected that Thomas Hamilton,got away with his offenses,before Dunblane,because he was a Free Mason and alot of them,over here are Free Masons,as are Judges,Barristers and Lawyers and even Doctors.A perfect combination,for a bad license holder,to retain their license,on a hand shake.