# The Smoke Control Areas (Authorised Fuels) Regulations 1991, Paragraph 13

Extent: E+W+S
Status: prospective

Maxibrite briquettes, manufactured by Maxibrite Limited atLlantrisant, Mid Glamorgan, which—
(a) comprise anthracite fines (as to approximately 99 per cent of thetotal weight) and bitumenas binder (as to the remaining weight);
(b) were manufactured from those constituents by a process involvingroll-pressing and heattreatment at between 270°C and 300°C;
(c) are cushion-shaped briquettes marked with the letter“M” and have an average weight of 35 grammes; and
(d) have a sulphur content of approximately 1 per cent of the totalweight.

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Source: https://www.legislation.gov.uk/uksi/1991/1282/schedule/1/paragraph/13 (the official version)
Page: https://openlegislation.uk/smoke-control-areas-authorised-fuels-regulations-1991/schedule-1/paragraph-13
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.