Vetting of Staff of the Director-General of Ordnance Survey

Tel. No.—Whitehall 9400. Ext. 167 communication on this Any further subject should be addressed to:— The Under-Secretary of State, War Office, The London, S.W.1. SECRET 151 THE WAR OFFICE, LONDON, S.W.1. and the following number quoted. M.I.1(E)/1939 SECRET 13 April, 1949 Memorandum for:The Secretary, Joint Intelligence Committee, Cabinet Offices, LONDON, S.W.1. Reference JIC(49) 38th Meeting item 9. As a result of the new instructions issued concerning the security of maps, charts and plans, Government Departments, and in particular the Services, have prepared lists of Establishments which for security reasons it is considered should not appear on, maps, charts and plans.