You are working at a psychiatric hospital and one of the patients drags a nail along the side of your new car. Is the NHS trust responsible? Would it make any difference if there were a notice by the...

You are working at a psychiatric hospital and one of the patients drags a nail along the side of your new car. Is the NHS trust responsible? Would it make any difference if there were a notice by the car park exempting the NHS trust from loss or damage to staff cars parked there?