'FB' seein' as how you asked me directly I must say it is all double dutch to me because I really have no interest in ukcrab aviation - just NavAv and I'm dununder to boot. However a person steered me to this '********' "b l o g s p o t' so that needs to be added to URL - this opinion may be useful to you - dunno:
F-35 split buy idea is nonsense:
http://ukarmedforcescommentary.*****...-nonsense.html 25 Jun 2017 OR
https://tinyurl.com/y7ce4yh8
And yes 'sharkey' has blagged the F-35B compared to the F-35C but that is 'water under the bridge' because there ain't no Cs for CVFs or Naval Air Service - endof.