More than 700 postmasters and postmistresses wrongly accused of theft, fraud and false accounting between 1999 and 2015 as a result of the faulty Horizon IT system.
EXCLUSIVE - It is one of the greatest miscarriages of justice in British legal history, a wrongdoing so egregious and cold-hearted it seems astonishing it ever happened.
Former postmaster Alan Bates led and won a legal battle after himself falling victim to the scandal. His victory paved the way for dozens of convictions to be overturned. He is portrayed by Toby Jones.