I have to side with Katoen. Warranty issues on automobiles are decided by legislation and courts, not by manufacturers. Is it that different in the UK?
I found the MOG article through the mogwire link. I read it. Whitworth does NOT say that only part of the warranty is voided. He says the entire warranty is completely voided no matter what is the extent of the damage. Probably that is why MOG magazeine highlighted that quote.
"If you fit a non-genuine part that damages the vehicle- your warranty is voided. So What about Morgan - same scenario, your warranty will not be honoured."
Where does he say that they will only void the warranty on areas effected by the damage? And now we are told this is also born out in the owner's manual. The company also states there that the entire warranty is void (no matter what the extent of damage from a "non-genuine" part). He defines a genuine part as one from Aero Racing. Does this mean that if you cause damage installing one of their products, your warranty will not be voided. Nutty.
He should clarify what he is saying, for everyone's sake.
DanD