Original sentence: In 2007 he replaced Barbara Janke as leader of the party, and was expected to become leader of the Council but was blocked by a combined Conservative and Labour vote, who installed a Labour leader instead
Edited sentence: He was expected to become leader of the Council but was blocked by a combined Conservative and Labour vote, who installed a Labour leader instead.In 2007 he overthrew in a palace coup Barbara Janke as leader of the party after electoral failure