# The Smoke Control Areas (Authorised Fuels) (England) (No. 2) Regulations 2014, Paragraph 25

Extent: E+W+S

Ecoal 50 briquettes, manufactured by Coal Products Limited at Immingham Briquetting Works, Immingham, North East Lincolnshire which—
(a) comprise anthracite fines (as to approximately 30 to 55% of the total weight), biomass (as to approximately 25 to 35% of the total weight), petroleum coke (as to approximately 10 to 40% of the total weight), bituminous coal (as to approximately 0 to 5% of the total weight) and natural organic binder (as to the remaining weight);
(b) were manufactured from those constituents by a process involving roll-pressing followed by heat treatment at a temperature of approximately 300°C in a controlled, reduced oxygen environment;
(c) are hexagonal-shaped briquettes with a single stripe on one side across the flats;
(d) have an average weight of 135 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/2014/2366/schedule/paragraph/25 (the official version)
Page: https://openlegislation.uk/smoke-control-areas-authorised-fuels-england-no-2-regulations-2014/schedule/paragraph-25
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.