# The Smoke Control Areas (Authorised Fuels) (Wales) Regulations 2006, Paragraph 34


Supertherm briquettes, manufactured by Coal Products Limited at Immingham Briquetting Works, Immingham, North East Lincolnshire, which—
(a) comprise a blend (in the proportion of 19:1) of anthracite and medium volatile coal (as to approximately 93 per cent of the total weight) and cold-setting 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) are unmarked ovoids and have an average weight of 160 grammes; and
(d) have a sulphur content not exceeding 1.5 per cent of the total weight.

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Source: https://www.legislation.gov.uk/wsi/2006/2979/schedule/1/paragraph/34 (the official version)
Page: https://openlegislation.uk/smoke-control-areas-authorised-fuels-wales-regulations-2006/schedule-1/paragraph-34
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.