10:10 have a campaign for Daylight Saving Time Reform, to shift the clocks forward by an hour, to have lighter evenings in both summer and winter.
The benefits of doing this: (pasted from LighterLater.org)
1 Cut at least 447,000 tonnes of CO2 pollution –equivalent to more than 50,000 cars driving all the way around the world – each year 
2 Save 100 lives each year and prevent hundreds of serious injuries by making the roads safer 
3 Lower our electricity bills by maximising the available daylight and reducing peak power demand 
4 Create 60,000–80,000 new jobs in leisure and tourism, bringing an extra £2.5–3.5 billion into the economy each year 
5 Reduce crime and the fear of crime 
6 Help make people healthier and tackle obesity by giving people more time to exercise and play sport outside in the evening 
7 Save the NHS around £138 million a year through reducing road casualties 
8 Improve quality of life for older people 
9 Make the nation happier – including reducing the effects of Seasonal Affective Disorder 
10 Demonstrate that dealing with climate change can be good for the economy, good for people and good for society as a whole.
Half a million tonnes of CO2 a year sounds a lot, and is a lot, but it is only 0.09% of Great Britain's annual output of 568,520,000 tonnes of CO2.
Still, we have to start somewhere, and since this is a cost-free, convenient and popular measure, please sign the letter that 10:10 will send to the next Prime Minister.