French naval-architecture theory and British building experience

Why did France not bring in British ship designers more often?

France sometimes employed British designers, although confidence in its own architects favoured domestic work; greater British construction experience is offered as an explanation for differences in implementation.

France sometimes hired British designers, while its own naval architects had strong reputations and considerable pride in their work. One historian's interpretation is that French designers often developed strong theories, while British designers sometimes implemented those ideas more effectively. British architects tended to build more ships during their careers, gaining practical experience that helped them work out how to implement an idea. That is a proposed general tendency with exceptions, rather than a rule applying to every French theory or British design.