An investigation was launched after private details on a massive scale were sent to...G4S...[The] director of privacy and civil liberties campaign group Big Brother Watch...said:...“Given the information wasn’t needed as part of the negotiations, it was clearly a significant error for such a large number of staff’s details to be sent to G4S...The risk is that today the data was sent to a responsible person, but tomorrow the same error could see confidential details end up somewhere far more dangerous.”...Five files were sent electronically about staff from the three forces to G4S breaching the Data Protection Act 1998...Deputy Chief Constable...said:...“G4S responded extremely promptly and professionally when this matter was raised with them, ensuring that all personal data was deleted from their hard drives and records.”