Right i have decided to drive it, as its too cold for the vespa! I decided to look at all sensors, and on the rear offside, there was a stone trapped in between the disc and the back plate, now im thinking maybe the stone rattling around has damaged the sensor! but while driving, somtimes when braking, the pedel will grind like the abs is cutting in, and the light will be off, then it will go back on again! and thanks for the offer adyh, but i live in suffolk!