Even before Concorde and Martel, we did try, but it was all so hard.
May,1958: le Grand Charles is back. 3 July,1958:US eased the McMahon Act; UK could derive operable nuclear weapons. CDG tried 17/9/58 to join Anglos’ nuclear “Directorate”; rejection fuelled his inherent Anglosphobia J.Newhouse,89, Nuclear Age,Joseph,P324, even though “France benefited (too) with an import of enriched uranium for its prototype submarine reactor in 1959” G.Prins (Ed.), Defended to Death, P’in,83,P.340 and. “US agreed to sell a nuclear sub (=PWR reactor) to France” 10/62, I.Clark,Nuclear Diplomacy & the Special Relationship,OUP,94,P405, and also supplied tools to build solid rocket motors, INS and (later) KC-135A to extend Mirage IVA capability. Weapon design help was given to CEA/DAM; ops. inc.targeting, were discussed with FAF. But he embodied la Gloire and asserted a nuclear deterrence policy a tous azimuts. Collaboration with him required patience beyond Brit politicians' disposition.
PM Macmillan did try: UK “wants to join the European concern, France (to join Anglos’ A-List). Can terms be arranged?” UK should“ support (France) in their (sceptical) attitude towards NATO, give them the Bomb, perhaps some V-bombers, and generally support the idea of a confederation of Europe instead of a Federation”7/60: C.Williams,H.Macmillan,Weidenfeld,2009,P.375. Avro then schemed Blue Steel/Mirage IV: “no question of providing either warheads or information about their design”; “Br. leaders, rightly regarding (UK) as more advanced…thought (in ’62 with Concorde to have) made a gesture (to aid CDG’s) ambitions to construct a potent strike force(hoping he) would be grateful” (re.EEC) I.Clark, P319. (* note added, 29/8)
For NBMR.3, 8/61, Mirage IIIV was bid and BAC tried to spook onboard. In 1967 after AFVG was spreadeagled, BAC was not avid to be subordinate to Dassault, but yet worse would be ex-AFVG avionics in RAF-Buccaneer, so they pimped Spey/Mirage IV. But France's notions of marriage were, ah, gallic-centric. Which is why they were thrown out of (to be) Tornado, later of (to be) Typhoon.
Maybe on this FCAS UCAV-notion, the financial impossibility of going-it-alone may make it third time lucky.
(*: this US author was an ex-diplomat. I don't think he is alluding to the 1962 ogee transport as itself delivering ordnance: he is reflecting UK Ministers' hope for CDG recognition of military value in UK technology in big structures, big hot engines, to add endurance and longevity to a Mark 2 Mirage IV).