what indeed controllers have in the past frequently overlooked, that under the siege conditions to which we may be reduced, it is important to impose drastic economies even in the case of raw materials which at the moment are not in short supply. The events in the past few months, and notably the consequences of the invasion of Scandinavia, the Low Countries and France, make it clear that it would have been wise to anticipate the worst and, by reducing domestic consumption, to build up huge stocks of materials the supply of which did not appear at the time to present any particularly serious difficulties.