A List X site is a

commercial Commercial may refer to: * (adjective for) commerce, a system of voluntary exchange of products and services ** (adjective for) trade, the trading of something of economic value such as goods, services, information or money * a dose of advertising ...

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

UK government His Majesty's Government, abbreviated to HM Government or otherwise UK Government, is the central government, central executive authority of the United Kingdom of Great Britain and Northern Ireland.

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 (national defense in American English), is the security and Defence (military), defence of a sovereign state, including its Citizenship, citizens, economy, and institutions, which is regarded as a duty of ...

. 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 indust ...

(DSAS), part of the

Ministry of Defence A ministry of defence or defense (see American and British English spelling differences#-ce.2C -se, spelling differences), also known as a department of defence or defense, is the part of a government responsible for matters of defence and Mi ...

. 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