The exhibition of Katharina Fritsch's sculpture in Trafalgar Square has only just been rubber-stamped by planning bosses in Westminster - but the artist originally won the commission back in January 2011.
Here is how we reported on it at the time.
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The lukewarm reaction comes a week after the prime minister name-checked the mayor as a possible successor.
At 15 metres high, make a dramatic entrance at London's Hayward Gallery.
Jason Edwards was compared to a boxer - relentlessly cornering and punching his opponent on the ropes.