http://www.statewatch.org/news/2004/sep/03uk-dna-database.htm
"The highest court in the land, in the House of Lords, ruled on 22 July that DNA samples taken from people who are not charged with an offence or who are acquitted can still be held indefinitely by police. Looks at the history of police powers to take and retain DNA samples and the judgement by the "Lords of Appeal"."