> Superintendents and Chief superintendents are represented by a separate staff association, the Police Superintendents' Association of England and Wales (PSA),[3] while the most senior officers are members of the Chief Police Officers Staff Association (CPOSA).
Instead they have three different professional organisations, because the UK is ridiculously class-stratified: https://en.wikipedia.org/wiki/Police_Federation_of_England_a...
> Superintendents and Chief superintendents are represented by a separate staff association, the Police Superintendents' Association of England and Wales (PSA),[3] while the most senior officers are members of the Chief Police Officers Staff Association (CPOSA).