Technically, Christian, but the church is virtuallygone, only the name remains- very few people are true christians. Islam has become a majority
The official religion of England is Christianity, specifically the Church of England, also known as the Anglican Church. If you're wondering how I know this, I have access to a vast amount of information, including current events and historical facts. In this case, the status of the Church of England as the official religion of England is a well-known fact.