Barnet Urban District

From the Wikipedia page

Barnet was a local government district in south Hertfordshire from 1863 to 1965 around the town of Barnet.

Creation
Barnet Local Government District was created on September 25, 1863 under the Local Government Act 1858, and was governed by a local board. The Local Government Act 1894 reconstituted the area as an urban district and the local board was replaced by an elected Barnet Urban District Council. The urban district was extended in 1905, 1914 and 1935.

Civil parishes
The district originally consisted of parts of the parishes of Chipping Barnet in Hertfordshire, and Monken Hadley and South Mimms in Middlesex. The Local Government Act 1888 adjusted the county boundaries in 1889, so that the entire district was in Hertfordshire; forming part of a long, thin protrusion into Middlesex surrounded by that county on two sides, to the north and south.

The Local Government Act 1894 divided the urban district into three civil parishes:

In 1905 and 1914 respectively the parishes of Arkley and Totteridge were added, from Barnet Rural District. Rowley parish was added in 1935, created from areas previously in the parishes of Elstree, Ridge and Shenley in the Elstree Rural District.
 * Chipping Barnet
 * Hadley (from the part of Monken Hadley parish in Barnet UD)
 * South Mimms Urban (from the part of South Mimms parish in the UD)

Abolition
In 1965 the urban district was abolished by the London Government Act 1963 and its former area transferred from Hertfordshire to Greater London. Its former area was combined with that of other districts to form the present-day London Borough of Barnet.