Right , 
basically the situation is this , a couple of months back the ABS warning ligh t would come on for a while every now and again , this has now become a permenant fixiture . 
I read the fault code originally and it registered a sensor as intermittent and now as failed . 
Think it was a loose wire if had the wheel off and can find nothing loose  . 
Any idea how much its going to cost to get this sensor changed ? 
And three weeks from MOT day as well