Building Regulation Part L2B:
http://www.planningportal.gov.uk/buildingregulations/approveddocuments/

Department of Energy and Climate Change:
www.decc.gov.uk

Energy Performance Certificates:
http://www.planningportal.gov.uk/buildingregulations/greenerbuildings/epc

World CO2 emissions by consumption of energy, listed by Country:
https://spreadsheets.google.com/ccc?key=0AonYZs4MzlZbdFF1QW00ckYzOG0yWkZqcUhnNDVlSWc&hl=en – gid=1

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