For the last 7 months, the BBC has had reporter Mark Daly inside the Greater Manchester Police working as a policeman, including the full five months' training, without the knowledge or cooperation of the force. He has been secretly filming and recording his colleagues at work every day. His report is tonight at 9pm on BBC One, and he claims to have found overwhelming evidence of "institutional racism" within the organization.

This is going to be a hell of a story...