I recall a recently completed timeline where in the Royal Navy elects to maintain it's CATOBAR Carrier capability through to the present day. One of the butterflies is that British Aerospace partners with McDonnell Douglas to license-build F/A-18 Hornet's in early 80s (as a replacements for Britain's aging fleet of F-4s and EE Lightnings), and much wider export of the Hornet in general. Seems to me that this would offer a significant boost to the odds of both McDD's and BA's survival.