Law joined French holding company in April 2018 after 17 years at Interpublic's R/GA.
Watch the film conceptualised by Dentsu and Saatchi & Saatchi here
To be replaced by Magnus Djaba, UK chief executive of Saatchi & Saatchi Fallon
Executive chairman apologises for 'miscommunication on a number of points' that 'has caused upset and offense'
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