Investment bankers who move jobs to a corporate are like footballers who become managers. Like Ryan Giggs when he suddenly had to take over in the dugout at Manchester United last season, they get a new insight into how they looked out on the pitch.

After years as players, walking into one corporate office after another, trying to impress clients with ideas and insights, at last the ex-bankers can sit back and watch others pitch to them - which proves quite an eye-opener.