§ Mr. Loveridgeasked the Minister of Posts and Telecommunications how many cases of interference from communal television aerial systems have been reported to the Post Office by private television licence holders and other users of wireless telegraphy in the Greater London area during 1971 and 1972.
§ Sir J. EdenI regret the information is not recorded in the form requested, but I am satisfied that the technical appraisal of communal aerial systems, a prerequisite to the issue of my licence, substantially reduces the risk of such systems causing interference to other users of wireless telegraphy.
§ Mr. Loveridgeasked the Minister of Posts and Telecommunications how many technical questionnaire forms in connection with communal television aerial licences were appraised by Post Office engineers in the Greater London area in 1971 and 1972; and as a result of such appraisals how many communal aerial systems were considered to be likely to 231W cause interference to other users of wireless telegraphy; and how many systems did not measure up to the appropriate safety isolation characteristics required.
§ Sir J. EdenI regret the information is not available in the form requested. In 1971, 67 broadcast relay, including communal aerial, systems were technically appraised. Of these, one system was likely to cause interference to other users of wireless telegraphy and four systems, based on the technical information supplied, failed to meet the safety specifications. For 1972 the respective figures were 437, 211 and 29.