George Treadwell, a crew manager at London Gatwick's Fire and Rescue, gives a tour around one of the airport's 9 Øveraasen snow ploughs, which has been transition from diesel to Hydrotreated Vegetable Oil (HVO). London Gatwick has cut carbon emissions from its diesel vehicles by 90% by swapping the fuel for HVO. The switch means London Gatwick will save more than 950 tonnes of carbon emissions per annum.