The Russians sell plenty of things usable by the UK.
Their fighter bombers are pretty kickarse, navalised and likely cheap.
We dont have any naval fixed wing aircraft to replace. Nor any explicit need for any.
What theatre would they even be used in?
The F 35 needs stronger landing gear itself. And isn't currently expected to go into full production for another 7 years.
Given that the costs for F 35 are open ended and growing by the day... it's difficult to precisely weigh any comparative costs. However given that they cost over three times as much as a Eurofighter currently, and I would reasonably expect this price to increase...
What other nations have chosen for the F 18 doesn't concern me. Only what is the best buy for ours.
Made in the UK would be a bonus but not a necessity for a successful fleet air arm.
I would also agree that the UK however has entered into some sort of binding contractual agreement with the producers of the JSF to buy some. No idea what though.