Hi Harry.
I saw this and was hoping someone better qualified would answer. In the absence of this I'll have a go!
I'm pretty sure you are right. I do know that other companies carried out the 'Weedon repair' (there was about 10 I think, including, if I remember rightly, companies like Greener, Westley Richards etc) but I can't confirm it was originated at Weedon although it seems that the name of the standard is a pretty big clue!

Regards, Jon