HC Deb 21 October 1968 vol 770 c214W
79. Mr. Onslow

asked the Minister of Technology what research has been carried out by his Department during the past three years into the noise reduction problems of light aircraft and helicopters; and at what cost.

Mr. J. P. W. Mallalieu

In the last three financial years the Government and the industry have together spent about £1½million on noise research. The share attributable to light aircraft and helicopters cannot be separately costed.