Petrol and diesel prices at Isbister Bros Limited

Isbister Bros Limited, KW16 3LT.

What it is charging

• Diesel: 202.4p a litre, 3.7p over the national average, filed Thursday 29 October
• Super unleaded: 176.3p a litre, filed Tuesday 27 October

Unleaded within 5 miles

• Asda Dounby Express Petrol: 176.9p a litre, 3.2 miles away

On a 55-litre tank at 40mpg. The distance is straight-line rather than by road, so a real trip is longer than the one costed here.