Prince Harry visited Canary Wharf this morning to help raise money at a company’s annual charity day in honour of colleagues who died in the September 11 attacks.

The young royal got on the phones on the trading floors of global brokerage BGC Partners.

The prince was helping raise money for Sentebale, a charity he helped set up with Prince Seeiso of Lesotho to help vulnerable children in southern Africa.

He spent about an hour at BGC’s Canary Wharf offices meeting the company’s president Shaun Lynn and partner David Buik, before chatting to a family supporting brain tumour research charity Headcase, which set up a funfair in the building’s atrium for the day.

Prince Harry was due to make a speech from the trading floor before speaking to traders and their clients on the phone as he helps to close deals and encourage customers to donate money to charity.

BGC Partners is an affiliate of Cantor Fitzgerald, which holds the charity day each year to commemorate the 658 employees who lost their lives in the attacks on the World Trade Centre in New York in 2001.

A charity day to mark the 10th anniversary of the attacks will take place across BGC’s global offices, including Paris, Singapore, Hong Kong and Sao Paulo.

The company’s offices world wide have raised �40million for charity since it started the annual fundraiser.

Mr Lynn said: “To be in a position to raise millions of pounds for a number of remarkable and very deserving causes is fantastic.

“Every year we are fortunate enough to be joined by celebrity guests, staff and volunteers that all come together and with the support and generosity of our customers, raise as much as they can, in memory of the staff we lost.

“This year, more than ever, we want to do them proud.”

Other celebrities including model and actress Kelly Brook, film star Orlando Bloom, London mayor Boris Johnson, Rolling Stone Ronnie Wood, actor Ray Winstone, sports pundit Jamie Redknapp and Tottenham manager Harry Redknapp, will help raise money for 27 UK charities by helping BGC brokers with multi-million pound deals on the trading floor today.

All the profits from the day will be donated to charity.