Brits top Americans with biggest Olympics squad

British athletes, from left, 400m runner Christine Ohuruogu, Paralympic cyclist Jody Cundy, Paralympic swimmer Eleanor Simmonds, BMX cyclist Shanaze Reade, triple jumper Phillips Idowu, heptathlete Jessica Ennis, gymnast Louis Smith, Paralympic sprinter Jonnie Peacock and modern pentathlete Heather Fell pose in the new British Olympic Team GB kit designed by Stella McCartney during an unveiling in London on March 22, 2012.

(CBS/AP) LONDON - The biggest delegation at the London Olympics will be in red, white and blue.

The Union Jack variety, though.

The United States will only have the second biggest squad in London, with 530 competitors, while the British will have 542 athletes.

The hosts are fielding competitors in all 26 sports as the Olympics return to the British capital for the third time.

Britain's chef de mission Andy Hunt says "to have the largest delegation of all 204 competing nations at the London 2012 Olympic Games is a fantastic achievement."

Russia will have the third largest delegation followed by China.

There will be more than 10,000 Olympic athletes and more than 4,000 Paralympic athletes competing in London.

The opening ceremony is July 27.