Ok guys and gals we are getting there.
Caused turned out to be a timing issue with the injector pump, believed to be "possiably" caused by the garage that did the timing belt, something about un-doing the centre bolt of the injector rather than some other bolts.
Was running perfect for the past week, and then on Boxing Day.
It stopped dead 300 yards away from my home, cause is however that the injector pump fuse keeps blowing.
Guess its a case of looking at wires all around the injector pump. If anyone has any other thoughts on when to check also would be great, planning to do this on the next dry day, whenever that will be.
Cheers
Nigel