# The Smoke Control Areas (Authorised Fuels) (Wales) Regulations 2019, Paragraph 97

Extent: E+W

Taybrite briquettes (otherwise known as Surefire briquettes), manufactured by Coal Products Limited at Immingham Briquetting Works, Immingham, North East Lincolnshire, which—
(a) comprise anthracite (as to approximately 60 to 80% of the total weight), petroleum coke (as to approximately 10 to 30% 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 pillow-shaped briquettes marked with a single indented line running longitudinally along each face, offset from its counterpart by 10 millimetres, or unmarked;
(d) have an average weight of 80 grams; and
(e) have a sulphur content not exceeding 2% of the total weight.

---
Source: https://www.legislation.gov.uk/wsi/2019/50/schedule/paragraph/97 (the official version)
Page: https://openlegislation.uk/smoke-control-areas-authorised-fuels-wales-regulations-2019/schedule/paragraph-97
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.