1. Not really a liberal. In his earlier days he did some good work on preaching. I think you can still read his works on preaching while not accepting his false views on annihilationism.
2. Church of England
3. He has made Calvinistic statements in the past and has been much influenced by J.C. Ryle, so he says. That being said, he has gone off the deep end on the doctrine of eternal punishment.
4. In his earlier years he produced some helpful materials. Be forewarned, however, of some of his stuff.
I do remember reading that although he was friends with Lloyd-Jones, he was uncomfortable with many of MLJ's calls for Christians to come out of apostate, or compromising denominations. That is where he parted with MLJ.
Read him with care. I cannot endorse everything he has said.