A file of reports, correspondence, meeting minutes and memoranda concerning the readiness of the British intelligence services for a future war with the USSR. Topics of discussion in this file include the amount of time needed to properly prepare for a future war; intelligence gathering methods behind the Iron Curtain; the funding of the preparations; cooperation and sharing of intelligence with US intelligence services; and the organisation of ‘stay-behind’ agents to organise underground resistance in the event that Western Europe was overrun by the Red Army.