Luckily due to experience that the UK has with Harrier, Typhoon, Merlin etc. the RN and RAF actually have a significant number of personnel who are well versed and experienced in composite repairs, including the challenges presented by doing this whilst embarked on a ship.
Interesting point but I think you will find that:-
A. None of the UK military services that operate FJ actually repair anything anymore. Change components, yes, repair no. And that has been for almost a decade I believe.
B. Above is a mute point as any trained, authorised and experienced personnel [see above again] have long left the service[s].
Good luck in getting civil contractors [yes the ones who ^^^ got out^^^] on board any tub in an operational/war scenario.
"not for all the tea in china"
Of course HMG can recall whomever they like...