I have owned this vehicle for twelve months, always serviced and maintained. It has now started to cut out as though out of fuel but only if driven continously for 50+ miles. If it is left for 30 mins it will then restart and will drive for close to the same mileage and cut out. These symptoms have been present on several commutes. I now stop at 45 miles for a half hour rest. I think it must be something that is warming up, as I have no problems on short journey's. Timing belt done, head gasket done and a full service.