I stopped, got the vents off and opened up the engine bay, the mechanics quickly came over and within 10 seconds we found a stone lodged which had become lodged and pulled the belt off of the water pump pulley. They said they've never seen this happen before! a bit of adjusting and 15 mins later I was back on my way £10 lighter.
Very lucky that I didn't blow a gasket and didn't need recovery as no way I could have fixed it by the road! Anyway just thought id share my story as I'm feeling very lucky!


