Ronnie Park, managing director of First Glasgow, which runs bus services in Greater Glasgow, is understood to be taking a leave of absence. It is unclear if or when he will return to the post. A senior manager from First's Aberdeen division is understood to have been appointed temporarily in his place.
Mr Park took the post in 2010 after serving for three and a half years as operations director and deputy managing director. It is understood he was unhappy about deep cuts that First's senior management expected him to implement.