Long Serving Advertising Boss Steps Down

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The world's largest advertising agency, WPP, is losing its chief executive, Sir Martin Sorrell. He spent 33 years at the helm of the media giant. We ask analyst Alex De Groote what's next for the company. Also, Renault-Nissan is investing $1.6 billion in Russia's biggest car marker, AvtoVaz. With rising economic and military tensions, we ask Professor David Bailey from Aston Business School for his assessment. And with the Commonwealth Heads of Government group set to meet in London this week, we ask if the 53 nation block is still relevant in the business world. (Picture: Martin Sorrell at an advertising summit in 2016. Credit: Eamonn M. McCormack/Getty Images)