Why Britain kept the biplane Supermarine Sea Otter

Why did Britain adopt the biplane Supermarine Sea Otter while the United States fielded the monoplane OS2U Kingfisher?

The Sea Otter was a proven Walrus development that fit British scouting, communications, and rescue needs, where biplane utility mattered more than headline performance.

Britain did not need to copy the monoplane Vought OS2U Kingfisher merely because it was newer in layout. The Supermarine Sea Otter was a practical development of the Walrus and already matched Royal Navy requirements. Its biplane arrangement and lower wings could be useful in the work expected of it. Those jobs centered on scouting, communications, and search and rescue rather than high-performance combat, so continuity was a rational design choice rather than simple conservatism.