The scale of the Post Office scandal means that there are no easy and quick solutions for the government.
Ministers could advise the King to grant Royal Pardons, once reserved for the condemned as they faced the gallows.
But these would be largely symbolic acts because the government can't, at the stroke of a pen, quash a conviction. That’s because the courts are constitutionally independent - and that means a second option could be difficult too.
Parliament could pass an act declaring that all the Horizon convictions be quashed, but that would be an unprecedented meddling in the work of judges - and it would pave the way for politicians to do it again.
The third option is a mass appeal with a crystal clear submission to Court of Appeal judges that the state no longer believes the convictions should stand. There’s a precedent for this - 39 post office cases were overturned in one go in 2021.
But running such a case would not be easy - and it could still take years to resolve.