Almost 200 court cases in London are dropped or delayed every week because of prosecution failings. New figures show that in a year 9,560 cases were thrown out or delayed in the capital. That works out at 184 every week.
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Police have released CCTV images of a man seen close to the scene of one of the attacks.
A 20-year-old man who died in a triple stabbing outside Parsons Green Tube station has been named by police.
David Jones was responding to London's Fire Commissioner who said the term 'fireman' was outdated and should stop being used.