Chief inspector Steve Murrant with some of knives handed in during the amnesty in July
Knife amnesties are having no long-term impact on reducing knife crime, according to a Metropolitan Police report.
An eight-week amnesty run by the Met over the summer achieved only a slight dip in knife-related crime, with levels returning to normal within weeks, the review found.
The pre-amnesty average of 34.9 knife offences every day in London dropped to 31 a day during the operation, but the figure was back up to 34.2 within six weeks of it finishing.
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