Digest Of UK Energy Statistics (DUKES)An authoritative source of UK energy statistics, from the Department of Energy & Climate Change, the Digest, sometimes known as DUKES, is an essential source of energy information. It contains: extensive tables, charts and commentary; separate sections on coal, petroleum, gas, electricity, renewables and combined heat and power and a comprehensive picture of energy production and use over the last five years, with key series taken back to 1970. There is a link to older Digests held on the website of the National Archives.