TELE- COMMUNICATIONS RESEARCH ESTABLISHMENT. AIR DEFENCE AND RESEARCH DEVELOPMENT ESTABLISHMENT 1. The Committee had before them — L.P. (A) (42)4 — by the Ministry of Works; L.P. (A) (42)5 - by the Minister of Aircraft Production, regarding the removal from their present locations of the Telecommunications Research Establishment and the Air Defence and Research Development Establishment. Various alternative sites had been suggested for these Establishments; and the Committee reviewed the main alternatives.