SCHEDULEAuthorised fuels
21
Dragonbrite briquettes, manufactured by Tower Colliery Limited at Aberdare, Mid Glamorgan, South Wales, which—
a
comprise tower duff (as to approximately 95% 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 pillow-shaped briquettes marked with the letter “T” on one side;
d
have an average weight of 50 grams per briquette; and
e
have a sulphur content not exceeding 1% of the total weight.