MI5 is responsible for protecting UK citizens and interests at home, notably against threats to national security. By contrast, MI6 (also referred to as the Secret Intelligence Service) is responsible for gathering intelligence outside the UK in support of the government’s foreign and defence policies.

MI5 (Military Intelligence, Section 5), [2] officially the Security Service, is the United Kingdom's domestic counter-intelligence and security agency and is part of its intelligence machinery alongside the Secret Intelligence Service (MI6), Government Communications Headquarters (GCHQ), and Defence Intelligence (DI).

2023年7月10日 · MI5 vs MI6 Key Differences. MI5 and MI6 are two intelligence agencies in the United Kingdom, but they have different roles and responsibilities. Let’s break down the differences between them in simpler terms. MI5 is like the …

What is the difference between MI5 and MI6 (SIS)? MI5 and MI6 are both intelligence agencies and often work closely together, but we have different missions. MI5 protects the UK's citizens...

Find out about the core threats to national security that MI5 exists to protect against. Discover how MI5 works to protect against threats to national security through intelligence gathering...

Understanding the differences between MI5 and MI6 gives you a clearer picture of how the UK’s intelligence framework operates to protect national security. Each agency plays a vital role, with MI5 focusing on domestic threats and MI6 addressing international challenges.

2025年2月20日 · The main difference between MI5 and MI6 is that the former is the British Security Service and the latter is known as the Secret Intelligence Service. The MI5 was formed in 1909 as a response to threats to national security and to protect against espionage and sabotage.

MI5, also known as the Security Service, focuses on domestic intelligence and counterintelligence, while MI6, also known as the Secret Intelligence Service, is responsible for gathering intelligence abroad. In this article, we will delve into the attributes of MI5 and MI6, exploring their differences and similarities. History and Origins

2023年11月6日 · MI5 is the UK's domestic counter-intelligence and security agency, while MI6, known officially as SIS, operates as the UK's foreign intelligence service. MI5, formally titled the Security Service, focuses primarily on internal security in the UK, identifying and managing threats within the nation's borders.

A Secret Service Bureau was established in July 1909 and split into Home and Foreign Sections, now better known as MI5 and MI6. In October 1909, Mansfield Cumming, a 50-year-old Royal Naval Officer, was chosen to lead the latter. He commonly signed his letters simply with ‘C’, which is what we have since called all heads of MI6.