asked the Secretary of State for the Home Department what steps he intends to take to ensure that all vehicles carrying inflammable, toxic and explosive chemicals are clearly marked; and what proposals he has to ensure that proper instructions are displayed to suggest the required form of action in the case of accident.

The carriage by road of explosives and acetylene is controlled by regulations made under the Explosives Act, 1875, and that of petroleum spirit, petroleum mixtures, carbon disulphide and certain gases when compressed in metal cylinders by regulations made under the Petroleum (Consolidation) Act, 1928. The regulations contain requirements as to marking. The question of extending these controls and applying them to a wide range of other substances carried by road is being examined by the Standing Advisory Committee on Dangerous Substances which was set up recently.