Externally sourced quality control is still cost driven, and if it's done per unit, it wouldn't take long to run over with a couple of Friday cars. And apart from basic mechanical & MOT-worthy checks, plus door closure, and wheel alignment, what else can they do? They won't be removing all the screws to check they're the same!
And if anything comes to light which needs factory intervention, (eg paintwork or spares) that will add significantly to the logistics. So doing this work outside the factory doesn't appear to make much sense, unless the Chinese cars leave from Bristol?

Where is the holding warehouse for completed cars? Can somebody remind me?


DaveW
'05 Red Roadster S1
'16 Yellow (Not the only) Narrow AR GDI Plus 4