The Co-operative Group is reviewing its advertising account in a move which could spell the end of its three-year relationship with London agency Leo Burnett.

It’s understood that AAR has been approached to handle the review.

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Gill Barr left on July 4

Exclusive: Gill Barr leaves post as group marketing director of The Co-operative

A Co-operative Group spokesman told us today that a formal pitch process had not yet been launched.

Leo Burnett won the Group’s £50m creative account after a competitive pitch against Now and CHI & Partners.

TBWA\Manchester had previously been the lead agency between 2010 and 2012.

One industry source told Campaign that the latest review was a further attempt by the Co-operative to distance itself from the previous management team, which reported a £2.3 billion loss in 2013.

Watch Leo Burnett’s Co-op Christmas ad last year: