23. Ecobrite briquettes, manufactured by Arigna Fuels Limited at Arigna, Carrick-on-Shannon, County Roscommon, Republic of Ireland, which—
(a)comprise anthracite fines (as to approximately 96% of the total weight) and starch as binder (as to the remaining weight);
(b)were manufactured from those constituents by a process involving roll-pressing and heat treatment at 250°C;
(c)are unmarked pillow-shaped briquettes in two sizes;
(d)have an average weight per briquette of 37g in the case of the smaller size and 48g in the case of the larger size; and
(e)have a sulphur content not exceeding 1.5% of the total weight.