Meet Bob. He is standing on the street corner minding his own business being perfectly normal and not giving any cause for suspicion of criminality. Charlie the police officer comes along and stands next to him on the same corner.
If Bob approaches the officer and asks his name and warrant number must he give it to Bob?
On the other hand if Charlie were to demand Bob's identification details Bob, as an innocent person, would be perfectly entitled to refuse it with no comment. Is this accurate?