Islandshire was an area of Northumberland

Northumberland

Northumberland is the northernmost ceremonial county and a unitary district in North East England. For Eurostat purposes Northumberland is a NUTS 3 region and is one of three boroughs or unitary districts that comprise the "Northumberland and Tyne and Wear" NUTS 2 region...

, England

England

England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental...

, comprising Lindisfarne

Lindisfarne

Lindisfarne is a tidal island off the north-east coast of England. It is also known as Holy Island and constitutes a civil parish in Northumberland...

 or Holy Island, plus five parishes on the mainland.

It is historically associated with the Bishop of Durham, and was administratively an exclave of County Palatinate of Durham. It was transferred to the county of Northumberland

Northumberland

Northumberland is the northernmost ceremonial county and a unitary district in North East England. For Eurostat purposes Northumberland is a NUTS 3 region and is one of three boroughs or unitary districts that comprise the "Northumberland and Tyne and Wear" NUTS 2 region...

 by the Counties (Detached Parts) Act 1844

Counties (Detached Parts) Act 1844

The Counties Act 1844 , which came into effect on 20 October 1844, was an Act of Parliament of the United Kingdom which eliminated many outliers or exclaves of counties in England and Wales for civil purposes....

, becoming a hundred.

It formed part of the Norham and Islandshires Rural District

Norham and Islandshires Rural District

Norham and Islandshires was a rural district in Northumberland, England from 1894 to 1974.The district was formed under the Local Government Act 1894 from the Berwick rural sanitary district...

 from 1894 until 1974, and then formed part of the borough of Berwick-upon-Tweed

Berwick-upon-Tweed (borough)

Berwick-upon-Tweed was a local government district and borough in Northumberland in the north-east of England, on the border with Scotland. The district had a resident population of 25,949 according to the 2001 census, which also notes that it is the most ethnically homogeneous in the country, with...

 district within the County of Northumberland. In 2009 the borough of Berwick-upon-Tweed was abolished as part of wider structural changes to local government in England

2009 structural changes to local government in England

Structural changes to local government in England were effected on 1 April 2009, whereby a number of new unitary authorities were created in parts of the country which previously operated a 'two-tier' system of counties and districts...

, with the area now falling under the unitary council of Northumberland County Council

Northumberland County Council

Northumberland County Council is a unitary authority in North East England. It was originally formed in 1889 as the council for the administrative county of Northumberland and reformed in 1974 to cover a the newly formed non-metropolitan county of Northumberland...

.

It consisted of the parishes of Ancroft

Ancroft

Ancroft is a village and civil parish in Northumberland, England. Prior to 1844, Ancroft lay within the Islandshire exclave of County Durham. It is south of Berwick-upon-Tweed, and has a population of 885....

, Belford

Belford, Northumberland

Belford is a village and civil parish in Northumberland, England about halfway between Alnwick and Berwick-upon-Tweed, a few miles inland from the east coast and just off the Great North Road, the A1...

, Elwick

Middleton, Northumberland

Middleton is a civil parish in Northumberland, England. The parish is situated on the North Sea coast, south of the island of Lindisfarne, and contains the villages of Middleton, Ross, Detchant and Elwick; all are shrunken medieval villages. Both the A1 London to Edinburgh road and East Coast...

, Holy Island

Lindisfarne

Lindisfarne is a tidal island off the north-east coast of England. It is also known as Holy Island and constitutes a civil parish in Northumberland...

, Kyloe

Kyloe

Kyloe is a civil parish in the county of Northumberland, situated about south-east of Berwick-on-Tweed.The former church in Kyloe was built in the eighteenth century, replacing a medieval building, and is now a private house....

 and Tweedmouth

Berwick-upon-Tweed

Berwick-upon-Tweed or simply Berwick is a town in the county of Northumberland and is the northernmost town in England, on the east coast at the mouth of the River Tweed. It is situated 2.5 miles south of the Scottish border....

.