For a 400-mile trip from London to Glasgow, the carbon dioxide emissions per passenger travelling by road are 80.2kg, compared with 133.7kg by air and 46.8kg by rail, the report said.

In Britain, almost a quarter of annual carbon emissions are from transport, 85% of which is from road traffic.

In a report on sustainable transport, the Institute of Mechanical Engineers highlighted trains as one of the most environmentally benign ways to travel and put forward strategies to wean people away from travelling by car or plane, including extra fuel taxes, congestion charges and more aggressive road pricing.

Keeping your tyres inflated properly can improve petrol consumption by more than 3%. Four litres of petrol saved keeps 10 kg of carbon out of the atmosphere.

Car free cities  The car brought with it major unanticipated consequences for urban life and has become a serious cause of environmental, social, and aesthetic problems in cities.

Centre for Alternative Technology Information sheets about transport.

Liftshare Sharing journeys saves money, reduces CO2 and is fun!

Traveline – East Anglia For journeys with South and East England by all kinds of public transport

Raileasy UK Network Rail train bookings.

Seat 61 The Man in Seat Sixty-One will tell you how to travel overland comfortably and affordably where you might think that air was now the only option.

Spokes exists to serve cyclists in the South West Herts area. Our main objective is to further the cause of cycling in this area. Join us, join in and help. We are independent and non political and fund ourselves through members subscriptions

Sustrans Sustainable transport charity – information on long distance cycle routes, including online UK maps at small, medium and large scales.

VCA car fuel data Gives official fuel consumption figures so that you can make any car purchase as non-polluting as possible.