Some 18 months ago I filled my car at my usual Tesco petrol filling station using the diesel pump and getting a receipt for diesel. After about 800 yards the car started to misfire and a breakdown service was called who diagnosed fuel contamination (i.e there was petrol in the tank). The car was repaired at a cost of £4,500, most of which was paid by my insurers but Tesco have continued to deny liability and I am in the process of taking them to court. They maintain that as nobody else has complained it cannot be the diesel tank or the pump. Do you have any experience of a petrol pump temporarily malfunctioning and dispensing the wrong fuel?