Petrol and diesel prices at Thomas Duffy And Sons Ltd

Thomas Duffy And Sons Ltd, BT30 7QQ.

What it is charging

• Diesel: 189.9p a litre, 8.8p under the national average, filed Tuesday 20 October

Unleaded within 5 miles

• Eurospar Ardglass: 164.9p a litre, 1.5 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.