HC Deb 29 July 1959 vol 610 c86W
75. Mr. Snow

asked the Secretary of State for the Home Department how many prosecutions there have been for the twelve months ending the last convenient period in respect of commercial vehicles emitting noxious diesel exhaust fumes to an unnecessary degree due to faulty maintenance.

Mr. R. A. Butler

I regret that this information is not available. In the twelve months ended 31st March, 1959, there were sixty-four prosecutions in the Metropolitan Police District under the Regulation which makes it an offence in certain circumstances to use a motor vehicle which emits smoke. No record is kept of the types of vehicles concerned.