The Education Secretary Michael Gove has defended his decision to replace the chair of the school's watchdog Ofsted "in order to bring new eyes to bear".
The decision not to re-appoint Baroness Sally Morgan for a second term has reportedly left his deputy, Liberal Democrat David Laws "absolutely furious" at what he sees as a blatant attempt to "politicise" Ofsted.
Lady Morgan has accused No 10 of trying to fill public bodies with Tory supporters but stressed she had not had any falling out with Mr Gove.
Speaking to the BBC's Andrew Marr Show, Mr Gove said: "She's done a really good job".
He added: "I think it's wrong to claim that this government if favouring one group of individuals over another in public appointments."
If someone is a distinguished former Labour minister and they want to put their hat in the ring, then I would look favourably on that. If there's a distinguished Liberal Democrat educationalist, great. If there's someone who's a Conservative, why should they be ruled out just because they are a Conservative? I think that would be quite wrong.
ITV News Political Correspondent Carl Dinnen reports: