Organisers of London's bid for the 2012 Olympics have unveiled their new logo.
The logo was unfurled outside Tate Modern
The logo for the Olympic bid was revealed when a huge banner, 20m by 16m, was unfurled down the side of the Tate Modern in central London.
London 2012 was written in black capital letters with the five colours of the Olympics - red, blue, yellow, green and black - interwoven through the lettering in the shape of the River Thames.
London 2012 bid chairman Barbara Cassani said she was delighted with the design which was chosen above more than 1,000 potential entries.
She said: "This is the first really physical representation of the bid here in London - it is a very important step along the way.
"I like this design very much, it is quite festive as well as very cleverly incorporating the river as well as the colours of the Olympics.
"It is wonderful - I know we can have a lot of fun with it."
London will be up against nine other city applicants including Paris, Moscow and New York.
Included in the proposal is an 80,000-seat Olympic stadium in Stratford, east London and a 25,000-seat aquatic centre.
The potential 500-acre site focuses on east London's Lower Lea Valley and planning applications will be submitted in December.
The final bid will go before the International Olympic Committee (IOC) in November next year and the final decision will be made in July 2005.
Ms Cassani also spoke of her "surprise" at a £1m donation to the cause from Royal Mail.
The lump sum has been pledged as a way of saying sorry to the millions of people affected by the recent wildcat strikes which caused chaos in the postal system.
Ms Cassani said she was "grateful" adding: "It was just a big surprise. We will definitely be able to put the money to good use in the bid."
Allan Leighton, chairman of Royal Mail, said he would be writing to around four million households and businesses to personally apologise for the disruption.