The episode on the London Electric Vehicle Company in Coventry Building the Electric cab also uses gluing, not a welder in the entire programme. Have to say it is probably underappreciated the tremendous engineering and precision which goes into building a modern car.
I did post up some time ago a fascinating documentary of how they used to do it building a Peugeot quite a contrast, but equally impressive in its own way with lots of forging, casting, grinding heat and noise, but the whole car made in the same place and very little component sourcing from outside.
Regards Neil