Sir Martin Sorrell, CEO, WPP plc
CEO, WPP plc 15 November 2015
Location: UK
Rt Hon John Key, Prime Minister of New Zealand
Prime Minister of New Zealand 30 October 2015
Mark Carney, Governor of the Bank of England
Governor of the Bank of England 15 October 2015
Rt Hon John Howard, Former Prime Minister of Australia
Rt Hon John Howard Former Prime Minister of Australia 22 July 2015
Peter Kellner, President, YouGov
President, YouGov 21 April 2015