There has been a very steady reduction—a drastic reduction, in fact—in solid fuel.
Secondly, it would mean the diversion of solid fuel which was in great demand.
From the use of that material the direct derivative is a great economy in the use of coal or other solid fuel.
It does not normally apply to the ordinary coal merchant's shop, which handles the bulk of retail sales of solid fuel.
There are only a very few producers of smokeless solid fuel.
These two exemptions cover the sale of solid fuel in quantities not exceeding 2 cwt.
It seems likely that wood fuel may need to be dealt with separately from other forms of solid fuel.
If they wish to deliver mixed loads of coal and other solid fuel from the same lorry they can use 1 cwt.