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National DNA Database

I am grateful to my hon. Friend for his intervention. My argument is not that there should not be a database, or even that, under certain specific circumstances, the DNA of innocent people should not be kept. The problem is the chaos and the lack of a system. The people to whom my hon. Friend referred got their DNA removed almost immediately. I am working with completely innocent people who have waited years and years to get their DNA removed because, as I say, the Metropolitan police seem to labour under the idea that keeping such DNA is mandatory rather than being a matter of their discretion.