In this example everyone else was doing the normal, slow down gently for the cameras, then accelerate +10mph afterwards, all pretty normal on the A12, it's just a couple of morons, one in an Astra VXR (with a number plate to match) and another in a Golf GTI, who decided everyone was accelerating too gently and buried the loud pedal into the carpet straight after the cameras and then proceeded to use all three lanes as a slalom! The VXR almost did a pit manoeuvre on himself when he cut across in front of me he was so close.
So it wasn't so much their speed which was worrying, it was their driving style and ability (both youngster who thought they were Lewis Hamilton I guess). If anyone else had been driving with the same lack of attention or consideration to others as these two clowns were and did something quite normal like changing lane without indicating, there would have been a huge pile up.
Luckily as I'm also a motorcyclist, I have long known to treat all other road users as if they are complete idiots who are out to kill you, because 9 times out of 10, you'll be spot on!