asked the Minis ter of Transport whether, in view of the fact that under certain conditions of load and acceleration, diesel engines, operating within his recent regulations, may still emit fumes that can damage the human lung, he will appoint a small committee to examine the possibility of legislation to extend control over this threat to health.

The investigations being carried out by the Medical Research Council have hitherto failed to find any evidence of danger to health from diesel fumes in the concentrations to be found in our streets. What is needed in this field is a more practical way of enforcing the existing law. This is currently under investigation.