Geriaviator and Olympia: You may have solved a question that has lurked in the back of my mind for many years!
My first wife's father had worked as a draughtsman for Rolls Royce and said he "worked on the Merlin". I first knew them in Southend, when her dad was now employed at Ford's Dagenham plant. I'd always wondered how he came to move from RR to Ford's and I think I now have a valid explanation.
Too late for F-i-L as some young drunk driver did for him in '76...
Proves you do learn something new every day!