---
type: link
tags: [intelligence, renseignement, domestic, section 5, wikipedia]
created: 2025-12-26T18:36:04.717+00:00
updated: 2026-04-06T11:04:59.935288+00:00
---# MI5 : MI5 (Military Intelligence, Section 5): the UK's domestic counter-intelligence and security agency.

**URL:** [https://en.wikipedia.org/wiki/MI5](https://en.wikipedia.org/wiki/MI5)

MI5 : MI5 (Military Intelligence, Section 5): the UK's domestic counter-intelligence and security agency. Its primary role is to protect the UK against threats to national security, including terrorism, espionage, and sabotage. MI5 operates within the UK and deals with internal security matters. It is responsible for counter-terrorism, counter-espionage, and counter-subversion activities. MI5 is often referred to as the Security Service.

## Links

- [wiki: MI5](https://en.wikipedia.org/wiki/MI5)


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**Keywords:** intelligence, renseignement, domestic, section 5, wikipedia
