Facts: the police kept information on their database about persons who had been involved in demonstrations against a commercial arms manufacturer, although there was no evidence that such persons had acted in breach of the criminal law and the police also kept copies, for seven years, subject to review, of letters written to individuals warning them that their conduct might amount to criminal harassment.

Judgment: the Supreme Court (Neuberger, Hale, Mance, Sumption and Toulson JJSC) held that, on both cases, retention of the information was proportionate in the light of the policing objectives pursued.