Similar quandary in France at the moment as a volunteer social care worker took it upon herself to report an illegal immigrant staying with the family she was 'helping' to the police. Bearing the war-time history of denouncing people to the authorities in mind, her actions have gone down like a ton of bricks. My instinct would be to keep schtum, unless you're certain that you're patient is a serious danger to the public, then report via your chain of command/management. The chavs believing that you regularly report to the police won't stop them from calling you for a stubbed toe, but does make it more likely that they'll be hostile/agressive towards you. j