Whilst "RIPAs" (authority to invade people's privacy) are hard to come by in Blandshire Constabulary, a case of a detective in Major Crime leaking information to the press would probably justify one, albeit the investigators might stumble across a bunch of other private information on the journalist's phone in the process.
This case might cause particular alarm for us police bloggers. If a journalist had been in touch with us by telephone and produced articles on the strength of our information, could the police justify a RIPA into his phone records to reveal which bobby has been bragging?
My gut feeling is: they would LOVE to, but our posts would have to constitute criminal activity to fall under the Act. I don't think simply bringing discredit on our employers would do it.
Hoorah! Now when will all those journalists call...