THE PSNI is seeking a Supreme Court appeal of a judgment on warrants to seize material linked to loyalist blogger Jamie Bryson.
Last month the High Court ruled the warrants were wrongly obtained, but did not have them formally quashed.
The permits were to search addresses linked to Mr Bryson last August as part of an investigation into the supply of door staff.
Documents, laptops and an iPad were reportedly seized.
Mr Bryson argued police had no power to take journalistic material in the operation as they obtained consent from a lay magistrate rather than a County Court judge.
The High Court judge described affidavit evidence on the issue of Mr Bryson's asserted occupation as "strikingly meagre", and said a quashing order would be "inappropriate".
But he ruled Mr Bryson had established on balance that police should have known the materials they were pursuing would, as a realistic possibility, contain journalistic material.
Police are now seeking to appeal the judgment in the Supreme Court.
They have also sought clarification of its impact on cases where officers to not seek access to journalistic or 'excluded' material.
Mr Bryson yesterday alleged it was an "assault on the statutory protections afforded to journalistic material".
A PSNI spokeswoman said: "As legal proceedings are live, it would be inappropriate to comment further at this time."
It emerged during the High Court case that criminal proceedings have been commenced against Mr Bryson as part of the door staff probe.
The Security Industry Authority is prosecuting the 29-year-old for allegedly stating a company in which he is a director has never traded. He denies any wrongdoing.
