11 DECEMBER 2008

Prince Harry seems to throw himself 100 per cent into everything he does. So when the young royal was asked to broker a high-stakes deal in the City he stepped up to the challenge, joining stock market traders in fancy dress to close a £10 billion transaction.

Coached by a broker wearing a St Trinian's schoolgirl outfit, the Prince worked the phones at ICAP, a firm which holds an annual charity day during which all revenues and commissions are donated to worthy causes.

John Herbert, a company director dressed as Widow Twankey, was impressed. "(The Prince) did a 'ten yard' trade - a £10-billion sterling trade in something called a 'sonia', a sterling overnight index swap," he explained.

He added that the third in line to the throne had been a bundle of nerves before the call, remarking: "I think I'm going to mess this up" several times.

Luckily Harry pulled off the trade smoothly meaning his Sentebale charity, which cares for children in the African country of Lesotho, would be benefiting from some of the proceeds.

Photo: ©
The Prince joined workers in fancy dress at global brokerage firm ICAP for the company's annual day of trading to benefit charity Photo: © Getty ImagesClick on photos for gallery
Photo: ©
He closed a deal for £10 billion, with a little guidance from St Trinian's-dressed broker Amanda Hartnell Photo: © Getty Images