# The Smoke Control Areas (Authorised Fuels) (Wales) Regulations 2019, Paragraph 44

Extent: E+W

Firegold briquettes, manufactured by Coal Products Limited at Immingham Briquetting Works, Immingham, North East Lincolnshire, which—
(a) comprise anthracite (as to approximately 36 to 51% of the total weight), petroleum coke (as to approximately 40 to 55% of the total weight) and an organic binder or a molasses and phosphoric acid binder (as to a maximum of 20% of the total weight);
(b) were manufactured from those constituents by a process involving roll-pressing;
(c) are unmarked pillow shaped briquettes that are typically 54 millimetres in length, 58 millimetres in width and 34 millimetres in height;
(d) have an average weight of 87 grams; and
(e) have a sulphur content not exceeding 2% of the total weight on a dry basis.

---
Source: https://www.legislation.gov.uk/wsi/2019/50/schedule/paragraph/44 (the official version)
Page: https://openlegislation.uk/smoke-control-areas-authorised-fuels-wales-regulations-2019/schedule/paragraph-44
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.