# The Smoke Control Areas (Authorised Fuels) Regulations 1991, Paragraph 6

Extent: E+W+S
Status: prospective

Clean Flame briquettes, manufactured by Taybrite Limited atLlanelli, Dyfed, which—
(a) comprise a blend of anthracite and semi-anthracite coal (as toapproximately 94.5 per cent of the total weight) and hard grade bitumenbinder (as to the remaining weight);
(b) were manufactured from those constituents by a process involvingroll-pressing and heat treatment at about 250°C;
(c) are unmarked pillow-shaped briquettes and have an average weight of100 grammes; and
(d) have a sulphur content not exceeding 1.5 per cent of the totalweight.

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Source: https://www.legislation.gov.uk/uksi/1991/1282/schedule/1/paragraph/6 (the official version)
Page: https://openlegislation.uk/smoke-control-areas-authorised-fuels-regulations-1991/schedule-1/paragraph-6
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.