Liverpool Walton MP and Hillsborough campaigner Steve Rotheram has tweeted:
Bumped into Attorney General in Members Lobby. He confirms application to the High Court to overturn original verdicts has now been lodged.
More top news
Hurricane Maria is currently pummelling Puerto Rico with 155mph winds after already leaving at least nine people dead in the Caribbean.
Two men have been seriously injured after a gas explosion on an industrial estate.
The two top figures in the far-right group have been charged over leaflets and videos distributed in May.