A List X site is a

commercial Commercial may refer to: * a dose of advertising conveyed through media (such as - for example - radio or television) ** Radio advertisement ** Television advertisement * (adjective for:) commerce, a system of voluntary exchange of products and s ...

site (i.e. non-government) on UK soil that is approved to hold

UK government ga, Rialtas a Shoilse gd, Riaghaltas a Mhòrachd , image = HM Government logo.svg , image_size = 220px , image2 = Royal Coat of Arms of the United Kingdom (HM Government).svg , image_size2 = 180px , caption = Royal Arms , date_es ...

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 A security clearance is a status granted to individuals allowing them access to classified information (state or organizational secrets) or to restricted areas, after completion of a thorough background check. The term "security clearance" is ...

(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 (DSAS), part of the

Ministry of Defence {{unsourced, date=February 2021 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 The Office for Nuclear Regulation (ONR) is the regulator for the nuclear industry in the United Kingdom.< ...

References

External links

* * Government of the United Kingdom {{UK-gov-stub