Hang on - i've got it!....
Ditch the Orwellian Opels and get some Funk-tastic Orwellian stretch Limos insted! Have the driver at the front, obviously, telling the public via PA system to "get out the area" while at the back you have the big sticky up pole thing with the cameras on!
Drive the things round at a slow speed (normal driving speed in central London) problem solved!
Plus they could also be hired out to both celebs and paparazzi simultaneously...
celebs go to swanky party in the back of limo, cameras angled down to knicker angle by tabloid snappers, public get to see the back alleys behind nightclubs at 3am and celeb homes on Street view - everyone's happy and its less cars on the road, well kind of!