When it has cut out on me I've been doing between 50 70 mph I have tried to bump it in every gear as I coast to a stop, nothing happens. If I try to restart as soon as I've stopped it turns over but won't fire, unless the 20 to 30 min wait is applied

It judders a few times, prior to cutting out

It judders a few times, prior to cutting out

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...