Classified information in the United Kingdom is a system used to protect information from intentional or inadvertant release to another state. The system is owned by the Cabinet Office and is implemented throughout central and local government and the critical national infrastructure. The system is also used by private sector bodies which provide services to the public sector. A typical classified document. ... The Cabinet Office is a department of the Government of the United Kingdom responsible for supporting the Prime Minister and Cabinet in progressing matters that require coordination across Government departments. ...

The system is included in the Manual of Protective Security which specifies the impact of release and protection level required for each classification. Departments issue localised versions of the content of the MPS as appropriate to their operational needs.

System of Classification

The system uses five levels of classification:

• UNCLASSIFIED
• RESTRICTED
• CONFIDENTIAL
• SECRET
• TOP SECRET

Unmarked material may be considered as either UNCLASSIFIED or RESTRICTED, subject to departmental rules. Alternatively material may be marked as "NOT PROTECTIVELY MARKED"

Handling

Access to protectively marked material is limited by a system of security clearance. A security clearance is a status granted to individuals, typically members of the military and employees of governments and their contractors, allowing them access to classified information, i. ...

Protectively marked material must be accounted for in a manner appropriate to its classification level and disposal must be in accordance with the MPS. The act of destruction or disposal is included in the accounting process.

Descriptors

Protectively marked material may also be marked with a descriptor, or privacy marking, which identifies sensitivities around distribution and handling.

Examples of descriptors include, but are not restricted to:

• Budget
• Commercial
• Honours
• Management
• Medical
• Personal
• Policy
• Staff
• Visits (domestic or foreign royalty and ministers)

Nationality caveat

Protectively marked material may bear a nationality caveat, a descriptor defining which nationality groups it may be released to. By default material in the UK is not caveated by nationality, the classification being sufficient protection.

Examples of nationality caveats include, but are not limited to:

• UK EYES ONLY
• CANUKUS EYES ONLY - Canadian, UK or US citizens.
• AUSCANNZUKUS — Australia, New Zealand, Canada, UK and USA, the UKUSA Community.

The UKUSA Community is an alliance of English-speaking nations for the purpose of gathering intelligence via signals intelligence. ...

Codewords

Dissemination of already protectively marked material may be further limited only to those with a legitimate need to know using compartmentalisation by use of codewords. Examples of compartmented material would include information about nuclear warheads, fusion, and naval nuclear propulsion. In some case the existence of a codeworded compartment is itself classified. The deuterium-tritium (D-T) fusion reaction is considered the most promising for producing fusion power. ... The multinational Combined Task Force One Five Zero (CTF-150) The British Grand Fleet, the supreme naval force of World War I A rare occurrence of a 5-country multinational fleet, during Operation Enduring Freedom in the Oman Sea. ... Nuclear propulsion can include a wide variety of methods, the commonality of which is the use of some form of nuclear reaction as their primary power source. ...

Examples of codewords include, but are not limited to:

• LOCSEN — has local sensitivity, and may not be shown to local officials.
• NATSEN — has national sensitivity.
• DEDIP, DESDEN — may not be shown to certain named officials.

Vetting

Access to protectively marked material is defined according to a vetting level which the individual has achieved. Vetting is carried out by individual departments to standards laid down in the MPS.

Vetting is intended to assure the department that the individual has not been involved in; espionage, terrorism, sabotage or actions intended to overthrow or undermine Parliamentary democracy by political, industrial or violent means. It also assures the department that the individual has not been a member of, or associated with, any organisation which has advocated such activities or has demonstrated a lack of reliability through dishonesty, lack of integrity or behaviour. Finally the process assures the department that the individual will not be subject to pressure or improper influence thorugh past bahaviour or personal circumstances.^[1]

Five levels of vetting exist:

Counter-Terrorist Check (CTC)

Personnel whose work involves access to locations where protectively marked material is held, in an otherwise secure manner. A CTC does not allow access to protectively marked material and would typically be required for reception, catering or cleaning staff in a public sector facility.

Basic Check (BC)

A Basic Check allows routine and unrestricted access to material marked RESTRICTED and below with occasional, supervised, access to CONFIDENTIAL material where required in the course of ones duties. A BC confirms identity and employment/education references.

Security Check (SC)

Security Clearance allows routine and uncontrolled access to material marked SECRET and below with occasional, supervised, access to TOP SECRET material where required in the course of ones duties.

SC Clearance will normally consist of:

• a check against the National Collection of Criminal Records and relevant departmental and police records
• in accordance with the Security Service Act 1989, where it is necessary to pretect national security or to safeguard the economic well being of the United Kingdom from threats posed by persons outside the British Islands, a check against Security Service records
• credit references checks and a review of personal finances

In some circumstances further enquiries, including an interview with the subject, may be carried out. The review period is set by vetting department but 10 years is the norm.

Security Check Enhanced (SCE)

Security Clearance Enhanced allows routine and uncontrolled access to mertial marked SECRET and below with supervised access to TOP SECRET material where required in the course of ones duties.

SCE is a new security classification intended for those that carry out regular work related to Top Secret information but do not require unrestricted access to Top Secret documents. It comes into use July 2007.

SCE Clearance will normally consist of:

• a check against the National Collection of Criminal Records and relevant departmental and police records
• in accordance with the Security Service Act 1989, where it is necessary to pretect national security or to safeguard the economic well being of the United Kingdom from threats posed by persons outside the British Islands, a check against Security Service records
• credit references checks and a review of personal finances
• an interview with the persin being vettings and/or references from people who are familiar with the person's character in both home and work environment.

Developed Vetting (DV)

Developed Vetting allows routine and unrestricted access to material marked TOP SECRET and below.

DV Clearance will normally consist of:

• a check against the National Collection of Criminal Records and relevant departmental and police records
• in accordance with the Security Service Act 1989, where it is necessary to pretect national security or to safeguard the economic well being of the United Kingdom from threats posed by persons outside the British Islands, a check against Security Service records
• credit references checks and a review of personal finances
• an interview with the person being vetted
• references from people who are familiar with the person's character in both the home and work environment. These may be followed by interviews. Enquiries will not necessarily be confined to past and present employers and nominated characted referees.

DV clearance is subject to review over a period not to exceed 5 years.

References

1. ^ Hansard, Written answers 15 Dec 1994 Hansard online

See also

• Classified information
• Classified information in the United States
• List X company