The War Office place before the Air Ministry their requirements, and after discussion the most suitable types of aircraft are chosen. Orders for such aircraft are then given by the Air Ministry to the Ministry' of Aircraft Production. Thereafter there is direct liaison between the War Office, Air Ministry and Ministry of Aircraft Production on matters of design, modification and production. Approved requirements for the Fleet Air Arm are made direct to the Ministry of Aircraft Production by the Admiralty.
I know only what I have read out on this point. I do not know of any disagreement of a serious character, other than that which naturally arises when doubtful matters have to be discussed.