It's unclear what G4S would have to do before the Home Office started treating them with the scepticism they deserve.
BBC's Panorama programme recently exposed a culture of abuse, violence and bullying in Brook House detention centre, which is run by G4S. But even that is just the latest in a long line of worrying revelations involving G4S' running of custodial facilities in the UK.
An article by Claire Sullivan and Rudy Schulkind featured on politics.co.uk:
