Why are energy firms U-turning on green agenda now?

Lobbying group has been on wrong side of carbon debate for far too long, so should we really believe that this is more than just words?

The decision by Britain's most powerful energy lobby group to take a positive stance on building a low-carbon economy is a significant moment.

It gives major impetus to the green agenda just as it is being undermined by influential sceptics inside the Conservative party, Treasury and Department of Energy and Climate Change.