Data Protection Act
If the council asked if they could attach a sweeping machine to the back of your car would you say yes?
We recently installed cameras to a council offices car park, and the chap working in one of the planning offices stopped our chaps from working because the council did not have planning permission for them.(Even though they were protecting his car amongst others) Most councils are hard work, not because they want to be, but because they are structured that way, they have to be sure that whatever is done doesn't cause anyone to complain, or fall off and hit someone on the head. They will only use contractors that pass certain criteria. On the plus side they generally don't about the cost of stuff, but they are never the fastest payers.