Abbott told the Cumbrians' official website: "Michael came to see me and he told me that he felt that he wanted to get back down to Bolton to carry on his work down there. "He wanted more in the way of pitch time with us and we couldn't guarantee him that at this moment in time. "I spoke to Owen [Coyle] and he has been fantastic about the situation, so Michael leaves here with our very best wishes."
Source: team_talk