Where does your electricity come from?

13 Jan '11: Electricity companies are obliged to reveal their sources of power, but not all of them are keen to make it too obvious. Ecotricity, for example make a big fuss about this, even in the choice of their name, yet they are using a proportion of Nuclear power, presumably because by some definition the lack of burning coal makes it green, somehow.
  This website, electricityinfo.org is useful because it does show an up to date breakdown of the sources for each company. The only one that I can find that is 100% renewable based (Wind farms, home microgeneration etc) is Good Energy.
 There is a click link from this site to a 'Green Energy selector' which compares tariffs from companies who have sizeable proportions of renewable energy as their course.
http://www.electricityinfo.org/suppliers.php List of Suppliers and their green component.
http://www.greenelectricity.org/ Another site that enables you to compare green tariffs and make the switch. Good Energy are more expensive than others, but they are the only 100% renewable.