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In page Worker cooperative:

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A very significant early influence on the movement has been the Scott Bader Commonwealth, a composites and specialty polymer plastics manufacturing company in Wellingborough, Northamptonshire, which its owner Ernest Bader gave to the workforce in installments through the late 1950s to early 1960s. Contrary to the popular concept of common ownership organizations as being small organizations, this is a high-technology chemical manufacturer whose turnover has exceeded £100 million per annum since the early 1990s with a workforce of hundreds. In London, Calverts is an example of an established worker co-operative with a policy of pay parity. From the collective movement, one of the most successful ventures is probably Suma Wholefoods in Elland, West Yorkshire.