# The Smoke Control Areas (Authorised Fuels)(Wales) Regulations 2001, Paragraph 28


Supertherm II briquettes, manufactured by Coal Products Limited at Shildon, County Durham, which—
(a) comprise anthracite (as to approximately 36 to 51 per cent of the total weight), petroleum coke (as to approximately 40 to 55 per cent of the total weight) and an organic 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 140 grammes; and
(d) have a sulphur content not exceeding 2 per cent of the total weight.

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Source: https://www.legislation.gov.uk/wsi/2001/3762/schedule/1/paragraph/28 (the official version)
Page: https://openlegislation.uk/smoke-control-areas-authorised-fuelswales-regulations-2001/schedule-1/paragraph-28
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.