Fair enough gfunkdave....
So...you will demand footage NOT be downloaded if you are assaulted on the bus....since you don't like being "spied on"....?
(If UK law is anything like Australian in this area, the footage is stored onboard and ONLY downloaded where required...there is no routine viewing of it...it records for a certain amount of time...then records over it....unless SPECIFICALLY downloaded by those authorised to do so)