As the public enquiry into the Horizon IT scandal gears up,  Simon looks at the role played by the National Federation of sub-Postmasters, the Fed,  in the mass prosecution and conviction of its own members for fraud and theft that they were entirely innocent of. He is joined by author of The Great Post Office Scandal Nick Wallis, former Fed Executive Council member Mark Baker, and communications union (and refuge for dissident and disillusioned Fed members) national officer Andy Furey.  “A jaw-dropping tale of what happens when unions distrust their members and surrender independence.”  Music by Scott Holmes.   A Makes-You-Think production.