Used Classic Hornets are all ganz geschagget - like the population of Venezuela. broken down by age and sex.
This whole "Super Hornet FA1" imbroglio is interesting insofar as it rates only two plausible explanations - it's either quite serious or a theatrical move aimed at influencing the budget cutters, the USG or LockMart.
And although I'm sure Boeing would offer a whole bunch of work on the mods to the UK, I would guess that the idea hinges on keeping the core of the aircraft pretty common to the USN version.