MI6 SIS (British secret intelligence agency, MI6 SIS) is one of the six intelligence agencies in the world. It was established in 1909, formerly known as the Foreign Office of the secret intelligence agency. It is responsible for collecting intelligence for the British government all over the world, mainly using secret intelligence personnel (secret service), direct surveillance, communication interception, intrusive surveillance and other means are used to protect British national security and British economic interests. (source: MI6 official website)
