It’s got to be the P-8A Poseidon. RAF personnel already train with US Navy P-8As to keep up MPA/ASW skills. RAF should get the kit it trained with. Also, common airframe & systems ensures full interoperability with the USN. It’s GOT TO BE the P-8A Poseidon. If I was a Boeing salesman I’d surely be offering an affordable lease or lease-to-own package.