Smoking articles and smokable filler materials therefor

A smoking article in which the static burn rate can be altered without the need to alter the formulation of the smokable filler material comprising a wrapped rod of a smokable filler material, the smokable filler material consisting of a blend, which blend incorporates smoking material consisting of a noncombustible, non-agglomerated inorganic filler material, an alginic binder, and aerosol generating means in an amount less than 13% by weight of the smoking material, which three components together comprise greater than 90% by weight of the smoking material, and colourant at 0-7% by weight of the smoking material, and optionally granular carbon at 5-10% by weight of the smoking material, wherein the inorganic filler material has a mean particle size in the range of 500 μm to 75 μm, the particle size of the inorganic filler material being selected to provide the desired static burn rate, at least a proportion of the aerosol generating means being stabilized by being encapsulated or micro-encapsulated and wherein the smoking article has an aerosol transfer efficiency ratio of greater than 4.0.