Re: The devil is in the detail ...
...aaaand there you have it:
"...a record of the communications service that a person has used"
"a record" - could contain anything, as a minimum likely to be who it's from, who it's to, a timestamp and probably a geographic location. "See, it's just metadata. No content data at all, m'lud!"
"the communications service" - Email, Whatsapp, Skype, Facebook, Instagram, Snapchat, dating sites, your online banking service, the works basically.
"a person" - no fuzzy IP addresses here, mate, none of that rubbish. We're talking RealID (TM), backed up by biometrics and the FORCE OF LAW. Ha ha!!
Sheesh. It would be helpful if someone (anyone?) in the mainstream media could get out there and explain this stuff properly.