Sir Martin Sorrell has congratulated his successor, Mark Read, but reopened hostilities with his old company by claiming the five-month search for a new chief executive has been "a complete waste of time".
WPP's new chief executive Mark Read has promised "radical evolution" and chairman Roberto Quarta has insisted there were "plenty" of candidates who wanted the chief executive's job.
In an interview with Campaign, Sir Martin Sorrell insisted his new company, S4 Capital, is listening to clients because they are "questioning" how agencies are delivering work.
