From David Virtue's "England, Oh England, How Often Would I have gathered You...":
Britain is spiritually famished. It is starved from hearing the Word of God. Churches that focus on music and Eucharist are not drawing the crowds. People want to hear something that will change their lives. They want to hear about God, who He is, and what He is doing. They do not want sermons on the environment or Labor's policies for senior citizens. The average pulpit is bereft from hearing the Word of God.
Enter ALPHA. If it wasn't for ALPHA, one wonders if the Church of England would have any relevance at all. The other truth is that if the Church of England would do its job properly, there would be no need for ALPHA.
The very fact that ALPHA exists bespeaks the failure of the church to communicate the simple verities of the gospel to ordinary people. And it took an attorney turned priest to do it. The biggest growth in cities like London is precisely because of ALPHA's outreach into the urban jungle. ALPHA has been so successful they have taken over dying churches and filled them with new converts, much to the chagrin of laissez faire vicars who believe their benefice should not be beholden to these "happy clappy evangelicals."
Here's the link to Alpha USA.