British Security Service (MI5)

MI5, or the British Security Service, is the UK's domestic intelligence agency responsible for protecting national security. It primarily focuses on identifying and preventing threats such as espionage, terrorism, and sabotage within the UK. MI5 gathers, analyzes, and shares intelligence with other agencies, including law enforcement, to counteract those threats. Operating under the authority of the Home Office, it maintains strict confidentiality and legal oversight to ensure the safety of the country and its citizens without infringing on privacy rights.