Petrol prices look set reach £6 per gallon, and rising. Photograph: Graham Turner
The following correction was printed in the Guardian's Corrections and clarifications column, Tuesday 13 April 2010
This sentence read as though it was expressing national totals: "Supermarkets operate just 1,200 of the 10,000 petrol stations in the UK, but they account for an average of 12m litres of the 14.5m litres of petrol sold each year." What the writer meant was that each of the 1,200 supermarket sites sold an annual average of 12m litres, and the others each sold 2.5m litres a year