English: A chart produced by E.T. Wilkins c.1953, originally read at a lecture to the Royal Sanitary Institute, showing increased mortality during the Great London Smog, December 1952 - an excess of 12,000 deaths rather than the 4,000 originally estimated. Published as part of the "Beaver" Report in 1953.
This file is in the public domain because it was first published in a Crown Copyright UK government report ("Committee on Air Pollution: Interim Report") in December 1953. According to the UK National Archives: "Crown copyright work which has been published will have copyright protection for 50 years from the end of the year in which the work was published." The report and artwork therefore entered the public domain in January 2004.
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