I enjoyed this novel immensely. It has similarities to BRIDESHEAD REVISITED with the importance of religion and focus on British aristocracy in decline, and the narrator looks back and comments on his coming-of-age with the wisdom of old age, but here it is just "Stage One" of his life, with a sequel obviously to come.
Speaking of the sequels, I had trouble trying to find the name of the next book, so to aid others here are the titles of the "Lampitt Chronicles" (according to the "also by A.N. Wilson" list I found in a recent novel):
Incline Our Hearts
A Bottle in the Smoke
Daughters of Albion
Hearing Voices
A Watch in the Night
I haven't read any of the others yet, but INCLINE OUR HEARTS is funny, interesting re: random English attitudes toward class, boarding school, radio, the Church of England, etc., with a protagonist you care about. I recommend it.