# The Smoke Control Areas (Authorised Fuels) (England) Regulations 2008, Paragraph 33

Extent: E+W+S
Status: prospective

Phurnacite briquettes, manufactured by Coal Products Limited at Immingham Briquetting Works, Immingham, North East Lincolnshire, which—
(a) comprise anthracite duff (as to approximately 65 to 85% of the total weight), petroleum coke (as to approximately 20% of the total weight) and a molasses and phosphoric acid binder (as to the remaining weight);
(b) were manufactured from those constituents by a process involving roll-pressing and heat treatment at about 300°C;
(c) are ovoid-shaped briquettes with two parallel indented lines running longitudinally around the briquette;
(d) have an average weight of 40 grams per briquette; and
(e) have a sulphur content not exceeding 2% of the total weight.

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Source: https://www.legislation.gov.uk/uksi/2008/514/schedule/1/paragraph/33 (the official version)
Page: https://openlegislation.uk/smoke-control-areas-authorised-fuels-england-regulations-2008/schedule-1/paragraph-33
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.