In a follow up to the ten-part series The Great Post Office Trial, Nick Wallis explores how campaigners for justice around the Post Office scandal have been continuing the fight, and reveals startling new details on the story which have emerged in court. Since the original series aired, the government has officially launched an inquiry, chaired by Sir Wyn Williams. After controversy over its initially limited powers and scope, it's been widened and given statutory powers. Some Sub Postmasters are also seeking further legal redress, and attempting to pressure the government to cover the Sub Postmasters' costs from the initial trial. The minister responsibe, Paul Scully, sits down for his first interview on the subject with Nick Wallis. As the potential cases of miscarriage of justice work their way through the Court of Appeal, Nick discovers revelatory new documents which cast fresh light on what was going on inside the Post Office as the scandal unfolded. And we hear newly emerged stories of more Sub Postmasters affected, as the full scale of the story becomes clear. Presenter: Nick Wallis Producer: Robert Nicholson Executive Producer: Will Yates A Whistledown production for BBC Radio 4

After the introduction of a new computer system in the early 2000s, the Post Office began using its data to accuse sub-postmasters of falsifying accounts and stealing money. Many were fired and financially ruined; others were prosecuted and even put behind bars. In this ten-part series, journalist Nick Wallis, gets right to the heart of the story, as he talks to those whose lives were shattered and follows the twists and turns of a David and Goliath battle as the sub-postmasters tried to fight back. In the series finale, the sub-postmasters’ litigation comes to an end - but not everyone is happy. Nick asks what should happen next for the Post Office, and there’s a breathtaking revelation from the Criminal Cases Review Commission. Presenter: Nick Wallis Producer: Robert Nicholson Executive Producer: David Prest With Sound Design from Emma Barnaby and Story Editing from Alexis Hood. A Whistledown production for BBC Radio 4

After the introduction of a new computer system in the early 2000s, the Post Office began using its data to accuse sub-postmasters of falsifying accounts and stealing money. Many were fired and financially ruined; others were prosecuted and even put behind bars. In this ten-part series, journalist Nick Wallis, gets right to the heart of the story, as he talks to those whose lives were shattered and follows the twists and turns of a David and Goliath battle as the sub-postmasters tried to fight back. Today, Alan Bates and the sub-postmasters reach the High Court, and the Post Office’s secrets start to tumble out one by one. Presenter: Nick Wallis Producer: Robert Nicholson Executive Producer: David Prest With Sound Design from Emma Barnaby and Story Editing from Alexis Hood. A Whistledown production for BBC Radio 4

After the introduction of a new computer system in the early 2000s, the Post Office began using its data to accuse sub-postmasters of falsifying accounts and stealing money. Many were fired and financially ruined; others were prosecuted and even put behind bars. In this ten-part series, journalist Nick Wallis, gets right to the heart of the story, as he talks to those whose lives were shattered and follows the twists and turns of a David and Goliath battle as the sub-postmasters tried to fight back. Today, the sub-postmasters have hit rock bottom. Working with the Post Office has failed and their last hope is a long shot lawsuit. But Nick manages to get hold of some crucial documents and a whistleblower which might make all the difference. Presenter: Nick Wallis Producer: Robert Nicholson Executive Producer: David Prest With Sound Design from Emma Barnaby and Story Editing from Alexis Hood. A Whistledown production for BBC Radio 4

After the introduction of a new computer system in the early 2000s, the Post Office began using its data to accuse sub-postmasters of falsifying accounts and stealing money. Many were fired and financially ruined; others were prosecuted and even put behind bars. In this ten-part series, journalist Nick Wallis, gets right to the heart of the story, as he talks to those whose lives were shattered and follows the twists and turns of a David and Goliath battle as the sub-postmasters tried to fight back. Today, the Post Office is standing firm in the face of political pressure, and Nick explores an explosive intervention from an unlikely source - the sub-postmasters' own union. Presenter: Nick Wallis Producer: Robert Nicholson Executive Producer: David Prest With Sound Design from Emma Barnaby and Story Editing from Alexis Hood. A Whistledown production for BBC Radio 4

After the introduction of a new computer system in the early 2000s, the Post Office began using its data to accuse sub-postmasters of falsifying accounts and stealing money. Many were fired and financially ruined; others were prosecuted and even put behind bars. In this ten-part series, journalist Nick Wallis, gets right to the heart of the story, as he talks to those whose lives were shattered and follows the twists and turns of a David and Goliath battle as the sub-postmasters tried to fight back. Today, the mediation scheme designed to solve the problem is becoming fraught, so MPs step up the campaign of political pressure on the Post Office. And Lee Castleton, a sub-postmaster from Bridlington, tells his story. Presenter: Nick Wallis Producer: Robert Nicholson Executive Producer: David Prest With Sound Design from Emma Barnaby and Story Editing from Alexis Hood. A Whistledown production for BBC Radio 4

The extraordinary story of a decade-long battle with the Post Office, fought by their own sub-postmasters. Some call it the widest miscarriage of justice in UK legal history. After the introduction of a new computer system in the early 2000s, the Post Office began using its data to accuse sub-postmasters of falsifying accounts and stealing money. Many were fired and financially ruined; others were prosecuted and even put behind bars. In this ten-part series, journalist Nick Wallis gets right to the heart of the story, as he talks to those whose lives were shattered and follows the twists and turns of a David and Goliath battle as the sub-postmasters tried to fight back. Today, the rollercoaster ride contnues as hopes of a settlement turns to despair at an apparent change of legal tactics by the Post Office and campaigners face the prospect of a long and seemingly unwinnable courtroom battle. Presenter: Nick Wallis Producer: Robert Nicholson Executive Producer: Will Yates A Whistledown production for BBC Radio 4

The extraordinary story of a decade-long battle with the Post Office, fought by their own sub-postmasters. Some call it the widest miscarriage of justice in UK legal history. After the introduction of a new computer system in the early 2000s, the Post Office began using its data to accuse sub-postmasters of falsifying accounts and stealing money. Many were fired and financially ruined; others were prosecuted and even put behind bars. In this ten-part series, journalist Nick Wallis gets right to the heart of the story, as he talks to those whose lives were shattered and follows the twists and turns of a David and Goliath battle as the sub-postmasters tried to fight back. Today we hear the part a helicopter crash played in the campaign for justice as the sub-postmasters take their case to Westminster. Presenter: Nick Wallis Producer: Robert Nicholson Executive Producer: Will Yates A Whistledown production for BBC Radio 4

The extraordinary story of what some say is the widest miscarriage of justice in UK legal history as sub-postmasters take on the Post Office. After the introduction of a new computer system in the early 2000s, the Post Office began using its data to accuse sub-postmasters of falsifying accounts and stealing money. Many were fired and financially ruined; others were prosecuted and even put behind bars. In this ten-part series, journalist Nick Wallis gets right to the heart of the story, as he talks to those whose lives were shattered and follows the twists and turns of a David and Goliath battle as the sub-postmasters tried to fight back. Today we get inside the story of Sarah Burgess-Boyd, who was just one of hundreds of sub-postmasters charged with theft. We hear first-hand her contemporaneous testimony to her accusers. We also learn about the oldest recognised criminal investigations force in the world - the Post Office Presenter: Nick Wallis Producer: Robert Nicholson Executive Producer: Will Yates A Whistledown production for BBC Radio 4

After the introduction of a new computer system in the early 2000s, the Post Office began using its data to accuse sub-postmasters of falsifying accounts and stealing money. Many were fired and financially ruined; others were prosecuted and even put behind bars. In this ten-part series, journalist Nick Wallis, gets right to the heart of the story, as he talks to those whose lives were shattered and follows the twists and turns of a David and Goliath battle as the sub-postmasters tried to fight back. Today we meet the man who led that fight; the UK's Erin Brokovich, Alan Bates, founder of the Justice For Subpostmasters Alliance. A man who faced seemingly insurmountable odds in trying to take on a national institution but who refused to be cowed. Presenter: Nick Wallis Producer: Robert Nicholson Executive Producer: Will Yates A Whistledown production for BBC Radio 4