# The Smoke Control Areas (Authorised Fuels) (Wales) Regulations 2008, Paragraph 15


Dragonglow briquettes, manufactured by Tower Colliery Limited at Aberdare, Rhondda Cynon Taf, which—
(a) comprise tower duff (as to approximately 95 per cent of the total weight) and a resin-based binder (as to the remaining weight);
(b) were manufactured from those constituents by a process involving cold cure roll pressing;
(c) are unmarked pillow-shaped briquettes and have an average weight of 100 grammes; and
(d) have a sulphur content not exceeding 1 per cent of the total weight.

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Source: https://www.legislation.gov.uk/wsi/2008/3100/schedule/paragraph/15 (the official version)
Page: https://openlegislation.uk/smoke-control-areas-authorised-fuels-wales-regulations-2008/schedule/paragraph-15
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.