I can't think of a situation where it would be necessary to proclaim that fact in the course of duty though? I absolutely believe it is fact, but the duty is to uphold the law, not proclaim/debate/discuss these facts.
No, but equally the police should respect your right to practice Christianity when you are not on duty.
Given the way that the police have followed up on complaints about GC people committing hate crimes, what would happen if the police received a complaint because an employee had attended a Woman's Place meeting?