<P> Campaigners, including the Royal Society for the Prevention of Accidents (RoSPA) and environmental campaigners 10: 10, have made recommendations that British Summer Time be maintained during the winter months, and that a "double summertime" be applied to the current British Summer Time period, putting the UK one hour ahead of GMT during winter, and two hours ahead during summer . This proposal is referred to as "Single / Double Summer Time" (SDST), and would effectively mean the UK adopting the same time zone as European countries such as France, Germany, and mainland Spain (Central European Time and Central European Summer Time). </P> <P> RoSPA has suggested that this would reduce the number of accidents over this period as a result of the lighter evenings . RoSPA have called for the 1968--71 trial to be repeated with modern evaluation methods . </P> <P> While 10: 10 generally agree with the safety benefits, their "Lighter Later" campaign focuses on the potential energy benefits of Single / Double Summer Time, arguing that the change could "save almost 500,000 tonnes of CO each year, equivalent to taking 185,000 cars off the road permanently". </P> <P> These proposals are opposed by some farmers and other outdoor workers and by many residents of Scotland and Northern Ireland, as it would mean that in northern Britain and Northern Ireland the winter sunrise would not occur until 10: 00 or even later . However, in March 2010, the National Farmers' Union indicated that it was not against Single / Double Summer Time, with many farmers expressing a preference for the change . Other opponents of daylight saving measures say that darker mornings, especially in Scotland, could affect children going to school and people travelling to work . </P>

When did the clocks start going back and forward