The movement by brands to in-housing marketing, media and communications functions is all but over in its current form. But new operating models between agencies and marketers are underway. Mi3’s Executive Editor Paul McIntyre talks to IAG’s Director of Content and Customer Engagement Zara Curtis, Tumbleturn Media’s Jen Davidson, WPP's Hogarth CEO Justin Ricketts and CX Lavender’s Will Lavender.    

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