§ Mr. Bryant Godman Irvine
asked the Secretary of State for Trade and Industry what research and trials are being undertaken into the insulated cross-arm method of overhead transmission of 132 kilovolt electricity supplies.
§ Mr. Ridley
The Central Electricity Generating Board's long-term trials to establish the reliability of insulated cross arms are continuing at Connah's Quay. 433W Some tests on the effects of atmospheric conditions on these insulators are also in hand at Brighton. Technical difficulties remain, however, to the successful application of this technique and its eventual use in service remains in doubt.