Industrial Politics, A-7D/E and Jaguar.
May,1965. UK has an Option on 50 F-111K for long range nuclear strike. Makes an Agreement with France to do Anglo-French Variable Geometry Aircraft, Aeronavale, RN, FAF, RAF deep nuclear strike. UK to lead airframe, SNECMA to lead engine. The price extracted by France for that was UK commitment to 200 Breguet type selected by FAF as trainer, daylight mud mover, and Aeronavale strike: Breguet to lead airframe design, RR to lead engine.
Same time, DoD accepts Elliott HUD and Allison TF41 (=RR Spey) for A-7D/E, as industrial offset to F-111K.
Scroll now to 1971. F-111K and AFVG are dead. So is Breguet, absorbed by Dassault, who had Mirage F.1 in the precise Jaguar strike role, and SuEtendard displacing Jaguar M. Not until 1980-odd did BAe. secure control of Jaguar marketing and stop AMD's internal creative tension on exports. UK changed its order to 165 strike, 36 trainer...but stayed with it, despite AMD causing France to renege on AFVG, 6/67. The reason not to dump it for (something off-a-shelf, such as) A-7D was to occupy BAC sheds after Saudi Lightnings through 1970s until Tornado.