§ 64. Mr. Onslowasked the President of the Board of Trade how many infringements there have been, in each of the past three years, of his Department's noise abatement requirements at British Airports Authority aerodromes; and what have been the main causes of infringement in each of those years.
§ Mr. Goronwy RobertsThere have been no infringements of the restrictions on night jet movements at Heathrow in the last three years. The other main requirement, regularly monitored, is that limiting noise at defined monitoring points. The required information in respect of Heathrow is —
Year Departures Monitored Infringements 1966 59,501 51,930 (87.5℅) 498 (1.0℅) 1967 71,207 61,204 (86℅) 432 (0.7℅) 1968 79,685 71,121(89℅) 505(0.7℅) More than half the infringements in 1967 and 1968 occurred when main runways 22W were closed for maintenance. Monitoring did not begin at Gatwick until mid 1968. Infringements are running at the rate of about 0. per cent. of monitored take-off; about 89 per cent. of the total.