​Supermarket chain Waitrose has introduced two new gas-fuelled tractor units to its RDC at Leyland in a bid to make the company more green.

This is the first effort by the chain to attempt to remove as much diesel from its tractors and replace it with bio-methane, reports Logistics Manager.

Waitrose's green initiative was inspired by the opening of a gas refuelling station in Leyland by CNG Fuels, which is connected to the national high-pressure grid.

As it's part of this grid, the station can refuel up to 500 trucks a day, which is the largest amount of any other facility in Europe.

The bio-methane is sustainable and created from food waste and tracked virtually through the grid using Green Gas Certificates.

Simon Gray, vehicle engineering manager at John Lewis (parent company of Waitrose), said: "While we already have considerable experience of dual-fuel vehicles, operating solely on gas takes our environmental performance to another level."