ANNEX Draft Letter from the Secretary, Chiefs of Staff Committee (or General Sir Hastings Ismay). to Lord Portal of Hungerford With reference to your letter dated (to General Sir Hastings Ismay), the Chiefs of Staff have examined the question of the security risk to our plants, vis-a-vis third Powers. They consider that there are two aspects to the problem, namely, sabotage and leakage of information, and enemy action in time of war. Sabotage and Leakage of Information 2. The Chiefs of Staff feel that it must naturally be assumed that the risk of sabotage and leakage of information is prevalent as for any other highly secret weapon.