Pontificating about sticking to 70mph does not make you right if in fact you cut up the speeding driver as the highway code also says your actions should not cause other drivers to change their speed or direction. There's the legal and textbook way to drive and there is reality. Even the police cater for this with flexibility to overlook speeding which is within 10% + 2mph of the limit. Seeing a car in the rearview mirror as you must and should have done, haring up the outside lane and still pulling out while maintaining 70mph to overtake a car of similar speed is annoying at best and potentially dangerous if you had cut up the driver behind. You could have at least sped up to pass the car as soon as possible or slowed down and stayed behind the car until it was safe to pass at the constant 70mph that you obviously are intent on sticking to. The subsequent brake testing was an overreaction, though I can fully sympathise with their annoyance at you, but to the both of you I would say two wrongs don't make a right.
I deliberately go out in stolen 4 x 4s looking for brake testers, the get such a shock when I just nudge their rear ends and speed off.. :) (its the shocked look as I pass them that gets me)
Pontificating about sticking to 70mph does not make you right if in fact you cut up the speeding driver as the highway code also says your actions should not cause other drivers to change their speed or direction. There's the legal and textbook way to drive and there is reality. Even the police cater for this with flexibility to overlook speeding which is within 10% + 2mph of the limit. Seeing a car in the rearview mirror as you must and should have done, haring up the outside lane and still pulling out while maintaining 70mph to overtake a car of similar speed is annoying at best and potentially dangerous if you had cut up the driver behind. You could have at least sped up to pass the car as soon as possible or slowed down and stayed behind the car until it was safe to pass at the constant 70mph that you obviously are intent on sticking to. The subsequent brake testing was an overreaction, though I can fully sympathise with their annoyance at you, but to the both of you I would say two wrongs don't make a right.