It's pretty obvious why WPP has done this: new chairman Roberto Quarta and the board are fed up with trying to justify such huge amounts and reckon £15m will appease shareholders (and Theresa May possibly) while keeping Sorrell on board. They keep saying they've a succession plan (Sorrell is 72) but this seems to be confined to reviewing internal candidates. When Sorrell does finally step down external candidates, probably with a background in finance, will be high on the list as WPP is a £20bn company. As much like an investment trust as an agency group these days as its fortunes, more or less, mirror that of the marketing communications industry worldwide.