Why Coastal Command lost out in interwar air priorities

Were large landplanes considered for Coastal Command?

They were considered, but Coastal Command remained a lower priority than the Fleet Air Arm and Fighter Command through much of the interwar period.

Long-range coastal aviation never received the institutional priority its strategic role deserved. Coastal Command sat behind the Fleet Air Arm and Fighter Command through much of the interwar period. Fighter Command's later prestige can obscure how late aircraft such as the Spitfire and Hurricane arrived in useful numbers, while maritime patrol remained comparatively neglected. The problem was institutional allocation and timing rather than the absence of a valid long-range patrol mission.