Wow - just booked the scoob in with my local Vauxhaul garage (yeah, I know, but they're a 2 min walk away and have £19.99 MOTs). I had a chat with one of the testers......please don't put my car on the rollers and it has a sports CAT and needs to be cooking before it'll pass emmissions etc...he says, no worries we don't have a set of rollers to test brakes.

They have a braking zone on the workshop floor with sensors in it, they drive the car on at low speed and apply the brakes, the sensors measure the braking force being applied by each wheel, fantastic. If you have any concerns about hooligans road testing your car or it being subjected to a centre diff testicular tortion session check out your local Vauxhaul garage, they may be running the 1/2 price MOT offer too.