graphic showing 'Tale of the Co-op' book
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Potted history of Co-operative Group

As the troubled Co-operative Group launches a nationwide poll to ask people for their views on its future, BBC News has this potted history.

Business reporter Steph McGovern looks at the origins of the movement, recalls its recent financial woes and scandals - and hears the views of some customers.

The online survey will be open until 24 March and the results will be published at the group's annual meeting in May.

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