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Television programme about the UK supermarket industry. Includes clips of interview with Sainsbury's chairman Sir John Davan Sainsbury on the ideal size for a supermarket, economies of scale, and expansion of Sainsbury's across the UK. Also covers general food market trends and examples using other supermarkets.

Ends with credits onscreen reading "A Production for THE OPEN UNIVERSITY, BBC TV" and "© THE OPEN UNIVERSITY 1980".