# The Smoke Control Areas (Authorised Fuels) (England) (No. 2) Regulations 2014, Paragraph 32

Extent: E+W+S

Homefire briquettes, manufactured by Coal Products Limited at Immingham Briquetting Works, Immingham, North East Lincolnshire, which—
(a) comprise anthracite fines (as to approximately 40 to 70% of the total weight), petroleum coke (as to approximately 20 to 45% of the total weight), char (as to approximately 0 to 10% of the total weight), bituminous coal (as to approximately 5 to 30% of the total weight) and an organic binder or a molasses and phosphoric acid binder (as to the remaining weight);
(b) were manufactured from those constituents by a process involving roll-pressing;
(c) have a volatile matter content in the finished briquette of neither less than 9 nor more than 15% of the total weight on a dry basis;
(d) are unmarked hexagonal briquettes;
(e) have an average weight of 140 grams per briquette; and
(f) have a sulphur content not exceeding 2% of the total weight.

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Source: https://www.legislation.gov.uk/uksi/2014/2366/schedule/paragraph/32 (the official version)
Page: https://openlegislation.uk/smoke-control-areas-authorised-fuels-england-no-2-regulations-2014/schedule/paragraph-32
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.