Why did the Royal Navy not retain the leased CB90 patrol boats?
Short answerThe boats were useful, but money, sustainment, and the existence of other partial solutions made retention difficult to justify.
NotesThe leased CB90 boats were valuable for local security, landing-craft support, and raiding work. Keeping them would have required the Royal Navy to buy, maintain, and crew another specialized system. Existing craft already provided partial solutions to the same needs. The case becomes stronger if a forward-deployed ship carries a company intended for rapid reaction around the world.