The utility is using the van, loaned by Shell Gas, in its Luton-based leak detection unit. The Transit has a range of up to 200 miles in urban conditions from its 44 litre gas tank, which is underslung so it does not impinge on load space.

With favourable duty levels on LPG reinforced by the Budget, Shell estimates fleets can achieve savings after just 10,000 miles a year by switching from diesel to LPG.