Was Alan Watts a Buddhist?

I've just answered a question referencing Alan Watts . I'm aware he isn't a straightforward figure though I've always found him provocative and interesting. At one point I though he was a Buddhist having written books such as The Way of Zen . I'm pretty sure that isn't the case now. So the question is what kind of relationship did Alan Watts have to Buddhism. Was he a practitioner at any point in his life or did he just use the ideas in a kind of heady new age type of mix that he was pushing at the time?