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This month's Christmas special sees the industry's top creatives cast a critical eye over 2015's crop of festive ads, from John Lewis' annual "cry and buy" to Lidl's humorous, service-oriented campaign.

Emma de la Fosse, chief creative officer of OgilvyOne; Nils Leonard, chief creative officer and chairman at Grey London; and Chris Clarke, chief creative officer at Digitas LBi join Rachel to look back over Christmas ads past and present.

Please note that this episode features some explicit language, and party blowers.