If a Police Officer approached me in the street and asked me for name and address...
They must have reasonable grounds for such a request which they clearly explain at the time. It'd be the thin end of the wedge otherwise and it wouldn't take long before nuLabor's surveillance society routinely extended such powers to
"HALT!! Ihre papiere, bitte!".
There's a case in today's Oxford Mail where some thick plod used anti-terrorism legislation to prevent a 59 year old ex-RAF man on his way to buy fish and chips in Kidlington from taking pictures of police in a public place. See:
Police used terror legislation to stop ex-RAF engineer in Kidlington (From Oxford Mail)
I generally support the police service - but police officers mis-using their powers must be reported.