This marked the end of a long and gradual process by GM to consolidate its two European subsidiaries with preference for the larger, and in terms of both absolute sales and market share, more successful Opel, which sold 925 000 vehicles to Vauxhall's 143 600.Ward's Auto World, Volume 14, Issues 7-12, 1978, page xli Since the early 1960s, Vauxhalls, whilst being designed and built in the United Kingdom, increasingly shared their general specification, engineering features, and styling with Opel counterparts (the Viva with the Kadett and the Victor with the Rekord, for instance) even if the two cars were distinct, with few to any interchangeable parts. From the late 1960s and into the early 1970s, increasing economic turmoil in the UK, declining build quality, and increasing strike action throughout British industry (and in stark contrast, the Wirtschaftswunder or economic miracle of West Germany during the same period), plus the entry of the UK into the European Economic Community in 1973, made maintaining two parallel model lines serving similar markets increasingly undesirable. The FE Series Victor, launched in 1972, would be the last all-British Vauxhall. Following the introduction of the Chevette and Cavalier, virtually all future Vauxhalls would be lightly restyled Opels, under what was described by the company's management as "Opelisation".Parliamentary Papers, House of Commons and Command, Volume 25, H.M. Stationery Office, 1974, page 164 (The exceptions would be based on models from elsewhere in the GM organisation). However, Vauxhall retained its two British factories at Luton and Ellesmere Port, with most cars wearing the Vauxhall badge still being built in the UK.
