# The Smoke Control Areas (Authorised Fuels) Regulations 1991, Paragraph 12

Extent: E+W+S
Status: prospective

Homefire briquettes, manufactured by Coal Products Limited atCoventry, Warwickshire, which—
(a) comprise crushed bituminous coal;
(b) were manufactured from the coal by a process involving heattreatment at about 450°C and extrusion;
(c) are unmarked hexagonal briquettes and have an average weight of 200grammes; 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/12 (the official version)
Page: https://openlegislation.uk/smoke-control-areas-authorised-fuels-regulations-1991/schedule-1/paragraph-12
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.