Investment veteran John Harrison, whose wide-ranging financial services career spans more than three decades and includes senior positions at UBS Global Asset Management and Aon Hewitt, has left Henderson Global Investors after just over a year at the £82 billion manager.

Harrison, a visiting professor at City University's Cass Business School and an adviser to Surrey County Council's pension fund, had worked on Henderson's 12-strong multi-asset team on a part-time basis - three days a week - since August 2014.