Do you see the Royal Air Force or Royal Australian Air Force acquiring the B-21 Raider?
Short answerBoth purchases are considered unlikely, though an Australian acquisition remains a disputed possibility because its geography gives it a stronger need for long-range strike.
NotesAustralia has a stronger geographic case for long-range strike because of the ocean distances it must cross. A B-21 purchase would still require American export approval and an expensive support infrastructure. One forecast treats an export ban comparable to the F-22 restriction as likely, while another leaves an Australian purchase possible under a different US administration. Australian support for forward-based American bombers appears more plausible than an independently operated Raider fleet. Britain has less need for that range and little prospect of funding a new strategic bomber force.