Would broader British, German, and Canadian adoption have improved the Nimrod program?
Short answerYes; a larger shared fleet could spread upgrade and training costs and justify tanker, airborne-warning, and electronic-warfare variants.
NotesWider adoption would give the Nimrod program a larger production and support base. More airframes could reduce the burden of later upgrades and allow partners to pool some training and advanced support. Governments would also have a stronger reason to develop specialized versions rather than sustain only the core maritime-patrol aircraft. Tanker, airborne early-warning, and electronic-warfare variants are plausible branches of a larger common family.