JET, the fuel brand of Conoco, has launched its own-brand ultra-low sulphur diesel throughout its national network of 600 filling stations. The move co-incides with the roll-out of up to 12 more liquefied petroleum gas refuelling stations to add to its six-strong network.

It comes amid fears from vehicle manufacturers and conversion companies that a national lack of refuelling sites is stalling growth in the clean fuel vehicles industry.