It was to be one of the most ambitious just reform programmes in the world – a ‘common platform’ that would share information between the courts, lawyers and police, from arrest to court. But the quarter-of-a-billion pound IT project now stands accused of causing wrongful arrests and unlawful detentions. File on 4 has spoken with whistle-blowers from within the court service who say the system is unsafe, unfinished and beset with bugs, errors and glitches. Sources say early warnings were ignored and worry that the software continues to be rolled out to courts across England and Wales despite serious concerns about the risk it poses.

Producer: Ben Robinson