§ Mr. DafisTo ask the Secretary of State for the Environment what proportion of the United Kingdom population is estimated to be exposed to night-time noise levels in excess of 65 dB(A); what assessment he has made of the health effects of such exposure; and what plans he has to meet the targets for noise reduction contained in the European Community's fifth environmental action programme.
§ Mr. YeoResults from a noise incidence study of England and Wales carried out as part of my Department's noise research programme indicate that under 1 per cent. of the population is exposed to night-time noise levels above 65dB(A). Research in this area has not so far shown scientifically demonstrable links between night-time noise levels, loss of sleep and effects on health, but this area is being kept under review.
The importance of a quieter night-time noise environment is recognised in my Department's draft planning policy guidance note on planning and noise. It suggests a group of four noise exposure categories, in which different planning constraints on noise sensitive development are appropriate. Recommended noise levels for each category are set out in the draft guidance for both day-time exposure—07.00 to 23.00—and night-time exposure—23.00–07.00. Where relevant, the suggested noise level figures take account of, and broadly reflect, the EC fifth environment action programme. The draft guidance, a copy of which is in the Library, also offers more general advice on night-time noise exposure issues.