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Speaker's corner

The staff at Zaha Hadid’s offices in Clerkenwell didn’t need Forbes magazine to remind them that the Iraqi-born architect is one of the most powerful women in the world. They have their own Tannoy system to do that particular job. Astragal's sources say Ms Hadid calls out names through the speakers to summon the worker bees into the Queen’s office. Unsurprisingly, there is only one microphone – and guess where that is.

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