He leaves the holding company role after just over a year.
Jon Cook and Mel Edwards say criticism over the loss of legacy agency brand names like J Walter Thompson and Young & Rubicam disrespects the work put into evolving them.
UK will report financial numbers directly to CEO Arthur Sadoun.
US agency group buys digital commerce business from owner of Cannes Lions.
WPP's CEO talks to Campaign after Q3 revenue decline.
Job cuts are likely to be part of plan focused on simplification at Group M and VML.
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