§ Mr. Wakefieldasked the Minister of Aircraft Production whether he is aware that his officers are still giving instructions to black-out daylight in factories by the use of bitumen and like substances, thereby causing unnecessary consumption of artificial light; and what action does he propose to take to stop this practice and encourage the maximum use of natural, instead of artificial, light, thereby saving fuel?
§ Colonel LlewellinI am taking steps to see that maximum use is made of natural light wherever that is possible, having regard to the necessity of complete blackout during the hours of darkness.