Petrol and diesel prices at Shell Little Waitrose Grovebury

Shell Little Waitrose Grovebury, LU7 9HH.

What it is charging

Unleaded: 171.9p a litre, 0.2p over the national average, filed Friday 30 October
Diesel: 199.9p a litre, 1.2p over the national average, filed Friday 30 October

Mfg Morrisons Leighton Buzzard: 164.7p a litre, 0.9 miles away. 7.2p a litre cheaper: saves £3.96 a tank, and costs about 33p of fuel to get there and back. Worth the trip.
Karan Lake Street Service Station: 164.7p a litre, 1.0 miles away. 7.2p a litre cheaper: saves £3.96 a tank, and costs about 37p of fuel to get there and back. Worth the trip.
Leighton Buzzard Superstore - Petrol Filling Station: 165.9p a litre, 1.4 miles away. 6.0p a litre cheaper: saves £3.30 a tank, and costs about 52p of fuel to get there and back. Worth the trip.
Downs: 171.9p a litre, 5.0 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.