SECRET MR. HOW said that administrative arrangements could not conform to a complete security ban on information. Something had to be disclosed, but the right balance must be sought between security and administration requirements. The functions of the three establishments were already well known, and from its appearance the function of Capenhurst would soon be obvious. The appointment of Dr. Penney as head of Aldermaston had become known to the Press and they might at any time, without infringing the letter of the 'D' notice, publish this fact together with the information which could be found in Who's Who that Dr.