^ Jump up to: a b c Note: The powertrain plant Opel Wien GmbH in Aspern/Vienna (Austria) is not a subsidiary of Adam Opel AG but a first-tier subsidiary of General Motors Europe Limited (GME) (99.5%) and of GM AUTOMOTIVE UK (GMAUK) (0.5%), see "Opel Wien GmbH, FN 110500a". FirmenABC Marketing GmbH. Retrieved 3 April 2017. Both, GME and GMAUK, are located in Luton. GME Ltd. itself is a daughter company of GM CME Holdings CV, which is directly controlled by the General Motors Corporation (GMC), see "Name: GENERAL MOTORS EUROPE LIMITED, Company Number: 07556915". Company search, Made Simple Group Ltd. Retrieved 3 April 2017.
By the 1970s, Opel had emerged as the stronger of GM's two European brands; Vauxhall was the third-best selling brand in Great Britain after the British Motor Corporation (later British Leyland) but made only a modest impact elsewhere. The two companies were direct competitors outside of each other's respective home markets, but mirroring Ford's decision to merge its British and German subsidiaries in the late 1960s, GM followed the same precedent. Opel and Vauxhall had loosely collaborated before, but serious efforts to merge the two companies' operations and product families into one did not start until the 1970s - which had Vauxhall's complete product line replaced by vehicles built on Opel-based platforms - the only exception to the rule being the Bedford CF panel van, the only solely Vauxhall design which was marketed as an Opel on the Continent. By the turn of the 1980s, the two brands were in effect, one and the same.
Just at war's end, a small skeleton crew began clearing the rubble from the plant. By May 1945, this work had advanced enough to allow the beginning of production of desperately needed Opel parts. Getting the materials for them was more dependent on barter and black markets than it was on normal sources of supply, which had all but ceased to exist.