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London Olympic rings unveiled

London 2012 chairman Lord Coe and mayor Boris Johnson were among the VIPs who watched as 25 metre wide and 11.5 metre tall Olympic were lowered into place on Tower Bridge.

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Boris Johnson and Seb Coe celebrate one month to go

London 2012 chairman Lord Coe and mayor Boris Johnson were among the VIPs who watched as the rings - 25 metres wide and 11.5 metres tall - were lowered into place on the central London landmark on the River Thames.

London Mayor Boris Johnson and Chair of the London Organising Committee of the Olympic and Paralympic Games, Lord Sebastian Coe. Credit: PA Wire

The rings, which weigh three tonnes, cost £259,817 to produce and installing them is estimated to have cost £53,000.

All costs have been met from the £32 million Look and Celebration budget, which will be used to back free cultural events across London.

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