Rick Prior, Vice Chair of the MPF said: "Metropolitan Police officers are - as we speak - out on the streets of London undertaking some of the most difficult and dangerous roles imaginable to catch criminals and keep the public safe.
"To have their personal details potentially leaked out into the public domain in this manner - for all to possibly see - will cause colleagues incredible concern and anger.
"We share that sense of fury... this is a staggering security breach that should never have happened."
He added: "Given the roles we ask our colleagues to undertake, significant safeguards and checks and balances should have been in place to protect this valuable personal information which, if in the wrong hands, could do incalculable damage.
“The men and women I represent are justifiably disgusted by this breach. We will be working with the force to mitigate the dangers and risks that this disclosure could have on our colleagues. And will be holding the Metropolitan Police to account for what has happened.
"Our brave Police Officers - who give up so much to do this job - deserve so much better."
