# The Smoke Control Areas (Authorised Fuels) (Wales) Regulations 2019, Paragraph 17

Extent: E+W

Briteheat briquettes, manufactured by Coal Products Limited at Immingham Briquetting Works, North East Lincolnshire, which—
(a) comprise anthracite (as to approximately 60 to 85% of the total weight), petroleum coke (up to approximately 30% of the total weight), bituminous coal (up to approximately 15% 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 cushion-shaped briquettes with an indented line running longitudinally around the briquette;
(d) have an average weight of 30 grams; and
(e) have a sulphur content not exceeding 2% of the total weight.

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Source: https://www.legislation.gov.uk/wsi/2019/50/schedule/paragraph/17 (the official version)
Page: https://openlegislation.uk/smoke-control-areas-authorised-fuels-wales-regulations-2019/schedule/paragraph-17
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.