"The police say that they need the material as they are investigating whether a breach of the Official Secrets Act and other offences have taken place – months after the high-profile claims by Francis were
“The police say that they need the material as they are investigating whether a breach of the Official Secrets Act and other offences have taken place – months after the high-profile claims by Francis were aired on Channel 4’s Dispatches and published in the Guardian.”
See the article: Police demand notes from Channel 4 on Lawrence spying whistleblower – Chief constable wants broadcaster to hand over material about revelations that undercover officers spied on Lawrence family (Guardian, link)