damage caused by the faulty petrol, and Tesco printed full page apologies in many national newspapers. A further consequence was a rise in petrol prices charged by traditional petrol companies, of up to 4p per litre, across the country. An AA spokesman said "Putting up prices to make a fast buck is completely unjustified. Sometimes garages increase the price to protect stocks from a sudden run. But if anyone has upped the price outside the areas where the problems have been then they are milking the system.". However, the UK Petroleum Industry Association replied "There is no profiteering. Oil products are priced to the market. Pump prices are usually linked to the price of crude oil or the wholesale price of petrol.". Further contamination Since the initial problem in 2007, many people have reported problems with their cars after filling up with petrol and diesel at Tesco filling stations. These problems normally caused the engine management light to come on, and ranged from problems with the fuel system to damaged lambda sensors. They may have been caused by silicon or even water found in the underground fuel storage tanks. In December 2015, Tesco in Faversham had a water leak in one of its tanks causing problems for some customers. References Uk Petrol Contamination, 2007 Petroleum products Supermarkets of the United Kingdom