Design critics described the jagged logo (picture) unveiled yesterday for London's 2012 Olympic Games as messy and dated with the most charitable saying it was brave but poorly executed.

But, the logo, four jigsaw-like pieces forming the numbers 2012 and coming in a range of colours from hot pink to electric blue, was saluted as innovative by Jacques Rogge, president of the IOC.

"(It was) an early indication of the dynamism, modernity and inclusiveness with which London 2012 will leave its Olympic mark," he said.

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