Given the incessant public debate about climate change and the need to reduce global reliance on fossil fuels, you could be forgiven for assuming that wind farms would be attractive to investors.

But the experience of Renewable Energy Generation suggests that is far from being the case. The credit crunch has restricted its ability to develop its UK and North American portfolio to such an extent it is to sell its Canadian wind farm operations to International Power Canada for an initial cash consideration of C$119m (£71m).