When royalty took to stock trading

Britain's Prince William (right) and Prince Harry (left) took to the trading floor at the BCG Partners brokerage in London on September 11, 2013. The company, formerly part of Cantor Fitzgerald, holds a Charity Day each year to commemorate the 658 employees who lost their lives in the 9/11 attacks on the World Trade Centre in New York.

William, the Duke of Cambridge and Prince Harry notched up a record trade for 25 billion euros but still had time to poke fun at each other, and play jokes on professional traders

The brothers spent nearly an hour negotiating deals during the firm's annual charity day.

During one joint telephone call, Prince Harry complained that the Duke, who became a father in July, was spending too much time talking to traders about Prince George. He said: "He's on the phone, it's all baby chat."

Asked how baby George is getting on, the Duke told one trader: "He's very well thanks. He's sleeping quite well."

At one point Prince William said to a broker: "Bloody hell, was that a billion?" After the trader nodded, the duke turned to Prince Harry and said: "Apparently, we should work here."

BGC broker Nick Thompson mentored Prince Harry through the deal he made alongside the duke. Thompson said: "He was great. He's very laid back about it. He did very well... Prince Harry was far more confident. Prince William was too busy with the baby chat, rather than the numbers."

All profits from the trades during the course of the day are donated to charity, including the duke's SkillForce and Prince Harry's WellChild organisations.