This contribution will examine the activity of the Anglican Church during the First World War, and the debates and reforms in the Church provoked by the war. The Anglican religion is of course composed of a series of ethical and theological beliefs, but it is also an established church - an ideological institution linked to the state, and it is a mass cultural activity. We will need to keep in mind the relatively broad nature of the Church of England, encompassing both a High Church wing, close in ceremony, liturgy and theology to the Roman Catholic Church, and a Low Church wing, with simpler ceremonies and practices closer to other protestant churches such as the Methodists.