The Smoke Control Areas (Exempted Fireplaces) (Wales) Order 2009

2.  No fuel is to be used other than:

• Untreated dry wood but excluding any such wood which contains halogenated organic compounds or heavy metals as a result of treatment with wood-preservatives or coatings;

• Peat or peat briquettes with, in either case, less than 25% moisture;

• Union Coal Briketts, manufactured by Rheinbraun AG of Germany comprising lignite compressed into briquettes of approx 15cm in length with square ends and with a sulphur content not exceeding 1% of the total weight;

• CPL wildfire, manufactured by Coal Products Ltd, Immingham, which comprise bituminous coal with a volatile content of 32—36% (as to approx. 96% of the total weight) and a cold cure resin binder (as to the remaining weight) are manufactured from those constituents by a process involving roll pressing, have an average weight of either 80—90 grams or 160— 170 grams, and have a sulphur content not exceeding 1.8% of the total weight.