In April 2021, the Court of Appeal quashed the convictions of 39 former Subpostmasters and ruled their prosecutions were an affront to the public conscience. They were just a few of the hundreds who had been prosecuted by the Post Office using IT evidence from an unreliable computer system called Horizon. When the Post Office became aware that Horizon didn't work properly, it covered it up. The Great Post Office Scandal is the story of how these innocent people had their lives ruined by a once-loved national institution and how, against overwhelming odds, they fought back to clear their names. Gripping, heart-breaking and enlightening, The Great Post Office Scandal should be read by everyone who wants to understand how this massive miscarriage of justice was allowed to happen.