J Walter Thompson London promote James Whitehead & Joe Petyan to CEO and European regional director respectively.

As chief executive, Whitehead will have full responsibility for the agency, its clients and its integration with specialist divisions such as digital innovation and ecommerce arm Mirum, content shop Colloquial and shopper marketing unit Geometry@JWT.

Petyan meanwhile will take on operational responsibility for the continental market at a time of considerable uncertainty pending Brexit negotiations. Both will report directly to European CEO Toby Hoare.