AmiMoJo writes: Leicestershire Police have announced that they will be scanning every face at the popular UK Download music festival. The announcement article on Police Oracle (paywalled) reads, "the strategically placed cameras will scan faces at the Download Festival site in Donington before comparing it with a database of custody images from across Europe." The stated goal is to catch mobile phone thieves. Last year only 91 of the 120,000 visitors to the festival were arrested, and it isn't clear if the data will be deleted once checked against the database. The linked article provides at least one image of a costume that would probably trip up any facial recognition technology yet devised.