Metropolitan Police Commissioner Sir Bernard Hogan-Howe has said he "apologises for the shock and offence" the undercover policing tactics of using dead children's names, and that this had been passed on to one family who discovered that their child's identity had been used.
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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.