The islands of the Bailiwick were subject to Roman rule and it is most likely that Christianity became established to some degree by the middle of the fifth century. From that time the islands were within the jurisdiction of the Bishop of Coutances. Circa 530, St. Sampson established a monastic diocese at Dol and was given authority by the King of France to minister in these islands. Papal Bulls in 1496 and 1500 purported to transfer the Islands from Coutances respectively to Salisbury and Winchester. However the islands remained in the Diocese of Coutances until 1568 when they were annexed to the Diocese of Winchester.
The islands remain legally under the jurisdiction of the Bishop of Winchester but on the 25th March 2014 the Bishop of Winchester delegated to the Bishop of Dover the episcopal oversight and functions reserved or assigned to him in all ecclesiastical legislation, canons, customs and protocols as apply in the Deanery of Guernsey. The Bishop of Dover exercises the episcopal functions delegated to him in canonical obedience to the Archbishop of Canterbury and all clergy in the Deanery owe canonical obedience to the Archbishop.
The Church of England is the Established Church in Guernsey, Alderney and Sark.
Until 1931 the churches in the Bailiwicks of Guernsey and Jersey were not directly represented in the national church institutions. The Channel Islands (Representation) Measure, 1931 provided that each of the Bailiwicks be entitled to send representatives to both the Church Assembly and the Winchester Diocesan Conference. Those two bodies became, respectively, the General Synod and the Winchester Diocesan Synod in 1970 by virtue of the Synodical Government (Channel Islands) Order, 1970. Since the 2014 transfer of episcopal oversight from the Bishop of Winchester to the Bishop of Dover Guernsey has not sent any delegates to the Winchester Diocesan Synod. Instead they attend meetings of the Canterbury Diocesan Synod in a non-voting capacity.
The 1970 Order also provided for the creation of the Guernsey Deanery Synod. There are parochial church councils in Guernsey and authority at parochial level rests with the incumbent and the churchwardens. Most parishes do, however, have a church advisory committee.
The Dean of Guernsey
The Very Reverend Tim Barker has been the Dean of Guernsey since November 2015. He is the senior Anglican priest in the Bailiwick of Guernsey, and has responsibility for leading and supporting the mission and ministry of our parishes. Tim was previously Archdeacon of Lincoln. He is a Canon of Winchester Cathedral and a member of the Church of England's General Synod.
Tim is assisted by the Reverend Mike Keirle, the Vice Dean.
The Bishop of Dover
Episcopal care for the parishes in the Bailiwick of Guernsey is provided by the Right Reverend Trevor Willmott.