As far as I can tell from reading around it, the UK isnt sending any f35 components to Israel. UK companies are producing components and putting them under US control as they are contracted to do, and the US is arming Israel. Unless you want to tell UK firms they cant send military equipment to the USA for fear they could arm Israel (which would be a dramatic move to put it lightly) I dont see what they could do.
Actually, while not technically “legal” Starmer is still arming them https://aoav.org.uk/2025/independent-mp-warns-starmer-britain-risks-hague-trial-over-arms-exports-to-israel/
As far as I can tell from reading around it, the UK isnt sending any f35 components to Israel. UK companies are producing components and putting them under US control as they are contracted to do, and the US is arming Israel. Unless you want to tell UK firms they cant send military equipment to the USA for fear they could arm Israel (which would be a dramatic move to put it lightly) I dont see what they could do.