St. Helen's, Berrick has long been a chapelry of St Mary's, Chalgrove, and identical lists of incumbents displayed in both churches show that, at least from the 11th century, the two parishes have always had the same priest, although they have had no common boundary since Berrick Prior was transferred to Newington parish in the reign of King Canute (as explained below). Moreau drew attention to another ecclesiastical oddity in the relationship; the incumbent is Vicar of Chalgrove but Rector of Berrick. He/she lives in the vicarage in Chalgrove, more than from Berrick church, and has no rectory in Berrick.