We use some essential cookies to make this website work.
We’d like to set additional cookies to understand how you use GOV.UK, remember your settings and improve government services.
We also use cookies set by other sites to help us deliver content from their services.
You have accepted additional cookies. You can change your cookie settings at any time.
You have rejected additional cookies. You can change your cookie settings at any time.
Departments, agencies and public bodies
News stories, speeches, letters and notices
Detailed guidance, regulations and rules
Reports, analysis and official statistics
Consultations and strategy
Data, Freedom of Information releases and corporate reports
The Security Service, MI5, is responsible for protecting the UK against threats to national security. MI5 works with the Home Office .
MI5's National Protective Security Authority issues new security guidance to protect democratic institutions from espionage and foreign interference.
Prime Minister David Cameron spoke on findings in the Intelligence and Security Committee of Parliament report on the murder of Fusilier Lee Rigby.
First published during the 2010 to 2015 Conservative and Liberal Democrat coalition government
Further information on this Centre for Defence Enterprise (CDE) competition for £1 million phase-1 research funding.
This publication summarises the use of resources by the security and intelligence agencies for the year ending 31 March 2017.
First published during the 2016 to 2019 May Conservative government
The Covert Human Intelligence Sources (CHIS) Bill will underpin the longstanding work of intelligence and law enforcement agencies.
First published during the 2019 to 2022 Johnson Conservative government
The Security Service, MI5, is responsible for protecting the UK against threats to national security.
The government has responded to the Intelligence and Security Committee (ISC) report on intelligence on the murder of Fusilier Lee Rigby in Woolwich.
This publication summarises the use of resources by the Security and Intelligence Agencies for the year ending 31 March 2014.
This publication summarises the use of resources by the security and intelligence agencies for the year ending 31 March 2016.
Don’t include personal or financial information like your National Insurance number or credit card details.
To help us improve GOV.UK, we’d like to know more about your visit today. Please fill in this survey (opens in a new tab and requires JavaScript).