LONDON (Reuters) -British ad group WPP slashed its profit guidance after some big clients left, others cut spending and new business dried up in June, putting it further behind Publicis in an industry ...

LONDON, Oct 23 (Reuters) - British ad group WPP (WPP.L), opens new tab returned to growth with a better-than-expected 0.5% rise in organic revenue in the third quarter, during which it won business ...