Adrian Walls from London Zoo explains why keepers have installed a diving board in the penguin enclosure in the run-up to the 2012 Olympics.
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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.