Paris has the Eiffel Tower, San Francisco has the Golden Gate Bridge, and London has Big Ben.

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Last November, it projected a light creating a 40-foot blue mustache on London's Big Ben.

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EU, as the Eiffel Tower and Big Ben symbolise Paris and London.

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Reportedly the result of a conversation between Mittal and London Mayor Boris Johnson at Davos, the Orbit surpasses both in Big Ben and the Statue of Liberty in height.

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Along with key landmarks such as Big Ben, the Houses of Parliament, and The London Eye going dark, the quadrocopters will turn off their glow in support of Earth Hour.

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He added that the stadium's 27-tonne bell was being cast on Friday at London's Whitechapel Foundry - where 13.5-tonne Big Ben was cast in 1856 - and would be inscribed with a quote from The Tempest's Caliban: "Be not afeard, the isle is full of noises".

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