Joint production capacity of 12,000 cars a year was provided, (although actual production was never more than a fraction of this)  and final assembly and hand finishing was at the Vanden Plas works in Kingsbury London.

The Vanden Plas Princess 4-litre R remained in production until 1968, just ahead of BMC's merge into British Leyland.
6,687 vehicles were produced at Kingsbury and an additional 312 C.K.D. kits were exported to South Africa bringing total production to 6,999 units.
It was the only mass-produced civilian vehicle from another manufacturer ever to use a Rolls-Royce engine.
Joint production capacity of 12,000 cars a year was provided, (although actual production was never more than a fraction of this)  and final assembly and hand finishing was at the Vanden Plas works in Kingsbury London.
The Vanden Plas Princess 4-litre R remained in production until 1968, just ahead of BMC's merge into British Leyland. 6,687 vehicles were produced at Kingsbury and an additional 312 C.K.D. kits were exported to South Africa bringing total production to 6,999 units. It was the only mass-produced civilian vehicle from another manufacturer ever to use a Rolls-Royce engine.
Vanden Plas Princess