Is the Prime Minister aware, that the estimate of £4,000,000 which he has just quoted was for six airships and not for two and, therefore, the figures he has given are not comparable at all. Further, whilst obviously we cannot go into details to-day upon this question, will the right hon. Gentleman arrange for the Supplementary Estimate to be taken as early as possible so that we shall have an opportunity of debating the statement which he has just made, without any delay.