Meaning of “trailer”
17(1)In this Part“trailer” does not include—
(a)an appliance constructed and used solely for the purpose of distributing on the road loose gritting material,
(b)a snow plough,
(c)a road construction vehicle,
(d)a farming implement not constructed or adapted for the conveyance of goods or burden of any description, when drawn by a farmer’s goods vehicle, or
(e)a trailer used solely for the carriage of a container for holding gas for the propulsion of the vehicle by which it is drawn or plant and materials for producing such gas.
(2)In sub-paragraph (1)(e)“gas” means a fuel which is wholly gaseous at a temperature of fifteen degrees Centigrade under a pressure of 1013.25 millibars.