I.S.S.B./S.6/M. Control of Embarkation of Foreigners at certain Ports in the United Kingdom. Memorandum by the Inter-services Security Board. 1. We have considered the question of control of embarkation of foreigners at certain ports in the United Kingdom, as directed in para. 3(ii) of J.I.C.(41)13th Meeting, held on 15th May, 1941. 2. For this purpose a Meeting was held yesterday, 20th May, at which the following were present:Colonel F. Thornton (Chairman) Cmdr. E.E.S. Montagu (Admiralty) I.S.S.B.