When the shortlist was announced, just before the Games began in July, judges described the Olympic Stadium in Stratford as having "a spirit of fun".
They said the architects had "designed a space to create an amazing atmosphere, where every seat has a great view".
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Police are investigating whether a Land Rover Defender found burnt out in West Horsley was involved in Tuesday night's ram raid.
The work, called Gift Horse, replaces the giant blue cockerel that previously sat on the plinth.
50 of the country's worst pollution blackspots are in the capital. Many in places you may visit every day.