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- Feb 17, 2006
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It lets the DVLA know what cars are on the road and what ones shouldn't be there using NPR cameras.
Yearly renewal is understandable paper discs make no sense though because the ANPR system uses the DVLA central database. I'd say it's to stop a member of the fuzz (who doesn't have an ANPR camera handy) having to check on the computer if any given car has valid tax, but if it was that easy every car would have a fake tax disc and would avoid ANPR cameras.