As of my knowledge cutoff in early 2023, Christopher Ash is a pastor, author, and teacher known for his work in the Christian ministry. He has written and contributed to various books, articles, and commentaries with a focus on Christian doctrine, pastoral ministry, and biblical exegesis. Ash has been involved with the Proclamation Trust, an organization in the UK that equips and resources preachers and Bible teachers. One of his notable contributions is the book "Married for God: Making Your Marriage the Best It Can Be," which explores the theological foundations of marriage based on biblical teachings. His work often emphasizes the importance of applying scripture to everyday life, encouraging a deeper understanding and faithful living according to Christian principles.