The UK's clocks are currently set to GMT during the winter and GMT+1 in summer. But campaigners want to put the clocks on the same setting as Continental Europe so it is GMT+1 in winter and GMT+2 in the summer.
They argue this would shift an hour of daylight to the evening when more people use the roads and need light for activities like sport or leisure.
A study of electricity consumption by Dr Elizabeth Garnsey at Cambridge University found that it would save half a million tonnes of carbon emissions in the winter alone.
The study, published in Energy Policy, looked at half hourly electricity usage over the winter period and calculated how it was affected by the changing of the clocks in autumn. They then used this information to work out how much energy would be saved if the UK stayed on GMT+1.
“The carbon savings associated with this clock change are significant”, said Dr Garnsey, “Equivalent to the carbon footprint of the production of 1,800 plastic bags for every home in Britain every year, or taking around 200,000 cars off the road every year.”