A List X site is a
commercial site (i.e. non-government) on UK soil that is approved to hold
UK government protectively marked information marked as 'Secret' or above, or international partners information classified ‘Confidential’ or above. This changed from 'Confidential and above' with the introduction of the
Government Security Classification Scheme.
It is applied to a company's specific site (or facility within that site) and not a company as a whole. The term has been used since the 1930s and is equivalent to facility
security clearance (FSC) used in other countries.
Locations with this status are those normally involved with defence research and manufacturing that is vital to
national security
National security, or national defence, is the security and defence of a sovereign state, including its citizens, economy, and institutions, which is regarded as a duty of government. Originally conceived as protection against military atta ...
. The complete list of sites is itself classified. The list is administered by
Defence Security and Assurance Services
Defense or defence may refer to:
Tactical, martial, and political acts or groups
* Defense (military), forces primarily intended for warfare
* Civil defense, the organizing of civilians to deal with emergencies or enemy attacks
* Defense industr ...
(DSAS), part of the
Ministry of Defence
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A ministry of defence or defense (see spelling differences), also known as a department of defence or defense, is an often-used name for the part of a government responsible for matters of defence, found in states ...
.
A similar scheme, '
List N'', is used for sites relating to civil nuclear research or power generation, and is administered by the
Office for Nuclear Regulation.
References
External links
*
*
Government of the United Kingdom
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