Each of the four
countries of the United Kingdom uses a different term to describe their unitary authorities. However, the
Office for National Statistics uses the collective term 'unitary administration' to describe all local government areas which operate as unitary authorities.
England : Unitary Authority tree. The tree on the left, on the concourse of the
Bournemouth Town Hall, was planted on 1 April 1997 to mark the occasion of Bournemouth council becoming a unitary authority on that day. This was part of the local government reorganisation of the late 1990s, when certain more urban districts were essentially separated from the relevant county council, with no services for Bournemouth residents now being carried out by
Dorset County Council. In
England, "unitary authorities" are those local authorities set up in accordance with the Local Government Changes for England Regulations 1994 made under powers conferred by the
Local Government Act 1992 to form a single tier of
local government in specified areas and which are responsible for almost all local government functions within such areas. While outwardly appearing to be similar, single-tier authorities formed using older legislation are not
unitary authorities thus excluding e.g. the
Council of the Isles of Scilly or any other single-tier authority formed under the older legislation and not since given the status of a unitary authority. This is distinct from the two-tier system of local government that still exists in much of England, under which local government functions are divided between
county councils (the upper tier) and
district or borough councils. Until 1996, two-tier systems existed in
Scotland and
Wales, but these have now been replaced by systems based on a single tier of local government, with some functions shared between groups of adjacent authorities. A single-tier system has existed in
Northern Ireland since 1973. For many years, the description of the number of tiers in UK local government arrangements has routinely ignored any current or previous bodies at the lowest level of authorities elected by the voters within their area such as
parish (in England and Wales) or community councils; such bodies do not exist or have not existed in all areas.
Northern Ireland Northern Ireland is divided into eleven districts for local government purposes. In Northern Ireland local councils have no responsibility for education, road building or housing (though they do nominate members to the advisory
Northern Ireland Housing Council). Their functions include
waste and recycling services, leisure and community services, building control and local economic and cultural development. Since their reorganisation in 2015 councils in Northern Ireland have also taken on responsibility for planning functions. The collection of
rates is handled by the
Land and Property Services agency.
Scotland Local authorities in
Scotland are unitary in nature but not in name. The
Local Government etc. (Scotland) Act 1994 created a single tier of local government throughout Scotland. On 1 April 1996, 32 local government areas, each with a
council, replaced the previous
two-tier structure, which had regional, islands and district councils.
Comhairle nan Eilean Siar (formerly the Western Isles Council) uses the alternative
Gaelic designation
Comhairle. While the phrase "unitary authority" is not used in Scottish legislation (whether from the Scottish Parliament or the UK Parliament), the term can be encountered (used either descriptively or erroneously) in a few official publications and in (usually erroneous) use by United Kingdom government departments.
Wales Local authorities in
Wales are unitary in nature but are described by the
Local Government (Wales) Act 1994 as "
principal councils", and their areas as
principal areas. Various other legislation (e.g. s.91(1)
Environment Act 1995) includes the counties and county boroughs of Wales within their individual interpretations of the phrase "unitary authority" as an interpretive not a definitive description. In s.2 of the Act each council formed for a county is allocated the respective English and Welsh descriptions of "
County Council" or "
Cyngor Sir", each council formed for a
County Borough is allocated the respective descriptions of "County Borough Council" or "
Cyngor Bwrdeistref Sirol"; in all cases the shorter alternative forms "Council" or
"Cyngor" can be used. ==Similar concepts in other jurisdictions==