WPP boss Sir Martin Sorrell has spoken out against politicians and business leaders for celebrating economic recovery when the market is “less worst” rather than growing.

Speaking to Bloomberg at the annual World Economic Forum, Davos, Switzerland, he said “you can’t declare victory until you see consistent gains year-to-year.”

Delegates at the PRCA and CorpComms Conference last October received the same message when Sorrell delivered the keynote.