In the second half of our conversation with Tim Farron, we discuss his conviction that Christians should get stuck into politics despite its compromises and challenges. Why did his own term as leader of the Liberal Democrats come unstuck so badly, and does he believe there actually is a ceiling on ambition for Christian politicians who wish to hold onto their integrity? What impact is social media and our accelerating, atomised society having on our politics, and how can we as believers resist being dragged along with this?