The Smoke Control Areas (Authorised Fuels) (Wales) Regulations 2019

51.  Homefire briquettes, manufactured by Coal Products Limited at Immingham Briquetting Works, Immingham, North East Lincolnshire, which—

(a) comprise anthracite fines (as to approximately 40 to 70% of the total weight), petroleum coke (as to approximately 20 to 45% of the total weight), char (as to approximately 0 to 10% of the total weight), bituminous coal (as to approximately 5 to 30% of the total weight) and an organic binder or a molasses and phosphoric acid binder (as to the remaining weight);

(b) were manufactured from those constituents by a process involving roll-pressing;

(c) have a volatile matter content in the finished briquette of neither less than 9% nor more than 15% of the total weight on a dry basis;

(d) are unmarked hexagonal briquettes;

(e) have an average weight of 140 grams; and

(f) have a sulphur content not exceeding 2% of the total weight.