On 24 April 2011, Waller officially converted from Anglicanism to the Roman Catholic Church. He was ordained as a Catholic deacon on 14 May 2011 and as a priest on 11 June 2011, both times by
Thomas McMahon, Bishop of Brentwood.
Episcopal ministry On 29 April 2024, it was announced that
Pope Francis had appointed Waller as the next
ordinary of the Personal Ordinariate of Our Lady of Walsingham. He is
celibate and was therefore consecrated as the first bishop-ordinary of Our Lady of Walsingham; his predecessor Newton was married and therefore ineligible for the episcopate. His episcopal consecration took place on 22 June 2024 at
Westminster Cathedral with Cardinal
Víctor Manuel Fernández as the
principal consecrator, and Cardinal
Vincent Nichols and Bishop
Steven J. Lopes as
principal co-consecrators. He is also the first bishop of any of the three
personal ordinariates that has served as an ordinariate priest rather than being an external appointment. The following day, on 23 June 2024, he took canonical possession of the Ordinariate and was installed as its bishop-ordinary at
Church of Our Lady of the Assumption and St Gregory, Westminster. On 2 July 2024, Waller undertook his first ordination; that of
Richard Pain, a former Anglican bishop, to the diaconate. He then undertook his first ordinations to the priesthood of four men. including Pain, on 20 July. ==References==