Seems I've both managed to get my hands on some quality bikes whilst also being well out of my depth , is there any resources similar to the Claud butler website but for the carpenters? Or were they so bespoke that a catalogue was not even an option back then?
You certainly have. Perhaps time to say thank you for sharing. These kind of "barn finds" around here are exciting. Your wife's Grandad looks well proper and in his element on that photograph .
I was thinking over some wine (it's what I do best and my only real contribution) is that the Mavic wheelset may have actually been his best race day wheel set if he was into hill climbing competition.
You have two lovely bikes (and various wheels) in your possession that are wonderfully preserved. Bit by bit it will come together with more input.