MI5 - Security Service

Resources and Links

The Security Service works very closely with a wide range of organisations, Government departments and law enforcement agencies both in the UK and overseas (see "Partnerships"). Links to the websites of our main partners and other useful online resources are provided below.

The Security Service is not responsible for the websites listed below.  Providing links to the websites should not be taken as endorsement of any kind. We cannot guarantee that the links will work all of the time and we have no control over the availability of linked pages.

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UK Government Departments


GOV.UK is a United Kingdom public sector information website. It provides a single point of access to HM Government services. It replaced Directgov and the online services of Business Link on 17 October 2012.

The website is due to replace the individual websites of hundreds of government departments and public bodies by 2014. By 1 May 2013, all 24 ministerial departments and 28 other organisations had moved to GOV.UK.

Home Office

The Government department responsible for internal affairs in England and Wales. It deals with counter-terrorist policy and legislation. The Security Service works under the statutory authority of the Home Secretary. Further information on the Government's work to counter terrorism.

Foreign and Commonwealth Office (FCO)

The Government department responsible for foreign affairs. FCO travel advice draws on information from the Joint Terrorism Analysis Centre at Thames House. The FCO website provides travel advice on over 200 countries, including information on threats to personal safety abroad.

Cabinet Office

One of the Cabinet Office's key objectives is to co-ordinate security, intelligence and civil contingencies matters to protect the UK against disruptive threats. The Joint Intelligence Committee, which advises on priorities for intelligence collection and assesses performance against them, is based at the Cabinet Office. The Intelligence and Security Committee provides parliamentary oversight of the intelligence agencies.

Northern Ireland Office

The Northern Ireland Office works to secure a lasting peace in the Province, based on the Good Friday Agreement. The Director and Co-ordinator of Intelligence (Northern Ireland) reports both to the Director General of the Security Service and to the Secretary of State for Northern Ireland.

Department for Business, Innovation and Skills (BIS)

BIS aims to assist UK businesses at home and abroad. Its Export Control Organisation handles applications for licences to export controlled military and dual-use technology from the UK and therefore helps to prevent the proliferation of WMD to countries of concern. The Security Service works with the Office for Civil Nuclear Security (OCNS) of the DTI on issues of nuclear and radiation security and runs briefings jointly with OCNS for members of the civil nuclear industry.

Ministry of Defence (MOD)

The role of the Ministry of Defence, and the Armed Forces, is to defend the UK, and overseas territories, its people and interests, and work to strengthen international peace and security. The Defence Intelligence Staff (DIS) of the MOD is part of the UK's central intelligence machinery.

Department of Health

The aim of the Department of Health is to improve the health and well-being of people in England. The DH website provides information on emergency planning and advice on the treatment of chemical, biological and radiological casualties.

Health and Safety Executive (HSE)

The Health and Safety Executive is responsible for the regulation of almost all the risks to health and safety arising from work activity in the UK. Its website provides advice and guidance on a range of health and safety issues.

Department for Transport

The Department for Transport oversees the delivery of a reliable, safe and secure transport system(land, sea and air). The Security Service works with the Transport Security Devision (TRANSEC) of the DFT on issues of transport security and runs security briefings and roadshows jointly with TRANSEC for members of the transport industry.

HM Revenue and Customs (HMRC)

UK Revenue and Customs is the Government department with responsibility for collecting VAT revenue, customs duties and certain other taxes. It also plays a key role in protecting the UK from illegal imports of drugs, alcohol and tobacco smuggling and tax fraud.

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UK Intelligence Agencies

Secret Intelligence Service (SIS)

SIS, commonly known as MI6, is responsible for obtaining secret information and conducting operations in support of the UK's foreign policy objectives, and to counter threats to UK interests worldwide.

Government Communications Headquarters (GCHQ)

GCHQ is an intelligence and security organisation which reports to the Foreign Secretary. Through its signals intelligence work, GCHQ supports Government decision-making in the fields of national security, military operations and law enforcement.

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Law Enforcement Agencies

UK Police Service

The Security Service works very closely with the 43 police forces across England and Wales, particularly their Special Branches. The National Counter Terrorism Security Office (NaCTSO) co-ordinatesa nationwide network of specialist police advisors who may be contacted via local police headquarters. The UK Police Service portal provides links to regional police force websites.

Association of Chief Police Officers

ACPO coordinates policing policies on behalf of the 43 forces across England and Wales. It liaises with Government on dealing with civil emergencies and terrorist incidents. The National Counter Terrorism Security Office (NaCTSO) works to ACPO and provides a co-ordinating role for the police service in regard to counter-terrorism and protective security.

Metropolitan Police Counter Terrorism Command

The Counter Terrorism Command (previously the Anti-Terrorism Branch - "SO13") of the Metropolitan Police Service brings together intelligence analysis and development with investigations and operational support activity.

City of London Police

The City of London Police is responsible for the safety of London's "Square Mile". Its website provides information on countering the threat of terrorism in the City and on the work of its Anti-Terrorism and Public Order Unit.

Police Service of Northern Ireland

The Police Service of Northern Ireland (PSNI) is the successor to the former Royal Ulster Constabulary (RUC) and provides policing services across Northern Ireland.

National Crime Agency (NCA)

The National Crime Agency is a crime-fighting agency that tackles organised crime, strengthens our borders and fights fraud and cyber crime. It also protects children and young people. The NCA became operational in October 2013.

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International Terrorism

Jane's Information Group

Jane's Information Group is an independent commercial provider of open source information on defence and security issues. Their products include reports of terrorist incidents and events.

Chatham House

Chatham House is an independent institute that analyses international issues, including global terrorism.

International Institute for Strategic Studies

The International Institute for Strategic Studies provides objective information and analysis on military and political developments.

Royal United Services Institute

The Royal United Services Institute for Defence and Security Studies is a research organisation focusing on UK national and international defence and security issues.

Wilton Park

Wilton Park is an independent Executive Agency of the Foreign and Commonwealth Office. It organises conferences on a variety of issues, including terrorism.

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Security Advice

Confederation of British Industry (CBI)

The CBI represents companies from all sectors of UK business. It is a source of expert advice and information, and a forum for the generation of ideas and best practice exchange. The CBI's business guides cover issues such as business continuity and protecting your business in the electronic age.

Centre for the Protection of National Infrastructure (CPNI)

CPNI provides integrated protective security advice, covering physical, personnel and cyber  security measures, to the businesses and organisations that make up the national infrastructure. Through the delivery of this advice, CPNI protects national security by helping to reduce the vulnerability of the national infrastructure to terrorism, espionage and other threats.

Get Safe Online

Get Safe Online is a joint initiative between the Government, law enforcement, leading businesses and the public sector that provides computer users and small businesses with free, independent, user-friendly advice to help them use the internet confidently, safely and securely.


CESG is the Information Assurance arm of GCHQ and national technical authority for information assurance. It provides advice and assistance on the security of communications and electronic data. CESG works with Government departments and agencies and the Armed Forces, as well as public and private sector companies.

British Standards Institution (BSI)

BSI is the world's leading provider of standards covering every aspect of the modern economy. For example, BS 7799 deals with securing business information, BS 7499 covers static site guarding and mobile patrol services, and BS 7858 is the code of practice for security screening of individuals employed in a security environment. CPNI (see above) has also worked with the BSI to develop PAS 97: 2012 A Specification for Mail Screening and Security.

Disclosure and Barring Service

The Disclosure and Barring Service (DBS) helps employers make safer recruitment decisions. It also prevents unsuitable people from working with vulnerable groups, including children, through its criminal record checking and barring functions.

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Contingency Planning / Resilience

Greater London Authority

Greater London Authority is the website of London Resilience, an inter-agency team working to ensure London is prepared for major incidents or catastrophes. The website offers information and advice to Londoners, visitors and businesses on London's preparations for, and responses to, major emergencies.

Emergency Planning College

The Emergency Planning College, based within the Civil Contingencies Secretariat of the Cabinet Office, runs short seminars, workshops and courses on an inter-agency basis in the field of crisis management and emergency planning.

The Business Continuity Institute (BCI)

The mission of the BCI is to promote business continuity management worldwide. It provides an internationally recognised certification scheme for business continuity practitioners and is involved in the development of international standards. The BCI website includes details of its business continuity planning guides and conferences, training events and exhibitions.

Continuity Forum

An online resource for business continuity management professionals, providing advice and support services for organisations wishing to develop their business continuity planning and management.

Health Protection Agency (HPA)

The HPA is dedicated to protecting people's health and reducing the impact of infectious diseases, chemical and radiation hazards and poisons. The HPA website provides information on responding to health protection emergencies, including the deliberate release of biological, chemical, poison or radioactive substances.

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Other Links

Security Service Recruitment

This website provides information on the Service's recruitment schemes and lists current vacancies. Application packs for vacancies can be requested online. The site challenges some of the general assumptions people make about working for the Service and answers frequently asked recruitment questions.

The National Archives

The National Archives (formerly the Public Record Office) has one of the largest archival collections in the world. The Security Service first released records, up to the end of World War I, to the Public Record Office in 1997. In 2001 the Service agreed with The National Archives the criteria for deciding which files to release to the public and we now release historical records twice a year.

The Investigatory Powers Tribunal (IPT)

The IPT is an independent body set up by the Regulation of Investigatory Powers Act 2000 (RIPA) to consider complaints relating to the activities covered by the act. Members of the public who wish to make a complaint about the Security Service can write to the IPT.

The Defence Advisory (DA) Committee

The DA Committee, a voluntary body made up of media and official representatives, issues notices that are designed to protect sensitive and classified information. The "DA-Notice" System provides general guidance to the media on those areas of national security which Government believes it has a duty to protect.

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