Home Secretary Theresa May told the Home Affairs Select Committee it was "quite wrong" of West Mercia Police not to take disciplinary proceedings against the three officers.
Mrs May said: "The IPCC statement makes troubling reading.
"If it is indeed the case that warranted police officers behaved in the way Deborah Glass has described, that's not acceptable at all."
It's turning out to be a big week in the life of the story we call "plebgate".
West Mercia Police have confirmed they are reviewing a report on the 'Plebgate' scandal which is alleged to have been fundamentally altered.
Claims have emerged police officers changed the conclusions of a probe into a meeting between Andrew Mitchell and federation members.