§ Mr. VazTo ask the President of the Board of Trade what investigations the National Physical Laboratory has made into hum noise complaints relating to low frequency noise; and what results were published.
§ Mr. LeighThe National Physical Laboratory has not carried out any investigations into hum noise complaints in recent years.
I would refer the hon. Member to the Building Research Establishment, an agency of the Department of the Environment, where I understand some work of this kind is pursued.