WPP's chief executive Martin Sorrell will receive £36m worth of shares for his performance this year, the UK advertising giant revealed on Monday.The 2.3m shares are part of a scheme, dating back to 2010, that rewards success.The company is likely to come under scrutiny as shareholders have previously protested the large scale of Sorrell's pay.Sorrell, one of Britain's highest paid executives, was given shares worth £22.7m last year as part of an overall remuneration package of £29.8m.His latest payout comes after a five-year period during which the firm's market capitalisation increased by 133%. Sorrell, who has been chief executive for the past 29 years, will receive the maximum payout.