| Biography | Graham Douglas Leonard KCVO (8 May 1921 6 January 2010) was a British priest. His principal ministry was as a bishop of the Church of England but, after his retirement as the Bishop of London, he became a Roman Catholic, becoming the most senior Anglican cleric to do so since the English Reformation. He was conditionally ordained to the priesthood in the Roman Catholic Church and was later appointed a monsignor by Pope John Paul II. |