# The Smoke Control Areas (Authorised Fuels) (Wales) Regulations 2019, Paragraph 81

Extent: E+W

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 an organic binder or 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 up to 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/wsi/2019/50/schedule/paragraph/81 (the official version)
Page: https://openlegislation.uk/smoke-control-areas-authorised-fuels-wales-regulations-2019/schedule/paragraph-81
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.