1. DECC Estimates of Heat Use in the United Kingdom in 2013 Department for Energy and Climate Change London UK2014 https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/386858/Estimates_of_heat_use.pdf.
2. DECC UK Emissions from Heat Department for Energy and Climate Change London UK2012 https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/140095/4093-emissions-heat-statistical-summary.pdf.
3. Crown Climate Change Act 2008 UK The Stationary Office Limited London UK2008 Chapter 27 http://www.legislation.gov.uk/ukpga/2008/27/pdfs/ukpga_20080027_en.pdf.
4. DECC Renewable Heat Incentive Department of Energy and Climate Change London UK2011 https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/48041/1387-renewable-heat-incentive.pdf.