...Mr Owens contacted Lord Justice Leveson about his concerns over the way the matter was handled and is due to give evidence in person to the public inquiry on media standards on 30 November. Richard Thomas, the Information Commissioner at the time of Operation Motorman, will appear before the inquiry the next day.
At 7.25am yesterday, two police officers from Wilmslow, Cheshire, armed with with a search warrant, knocked on Mr Owens' door. They demanded documents and electronic files and asked him to come to a police station to be questioned under caution.
Cheshire Police said it had acted "following information received". A spokeswoman added: "The warrant relates to an investigation into allegations concerning breaches of the Data Protection Act 1998."
Mr Owens agreed to hand over his copy of the Operation Motorman computer file but declined to provide the statement he has prepared for Lord Justice Leveson's inquiry. He was asked to attend an interview on Monday and bring the statement with him.
Mr Owens, who has notified Lord Justice Leveson's office of the development, said he believed the raid was connected to his inquiry evidence. "They have come on a fishing expedition to find out what I'm going to say," he said. "But I have told them that statement is for Lord Leveson's eyes only at this stage."
He has already provided a statement and a copy of the Motorman disk to Strathclyde Police, which is investigating media dirty tricks in Scotland. "This is vindictiveness," he said of yesterday's raid. "They want to know what hard evidence I have got and what I am going to say to the Leveson Inquiry."