The SIS, often known as MI6, collects Britain’s foreign intelligence. Based at Vauxhall Cross in London, the SIS provides the British Government with a global covert capability to promote and defend the national security and economic well-being of the United Kingdom.
The MI6 Building is protected by a Faraday cage, which prevents the entry or escape of electromagnetic (EM) fields. This means that the work of the 2,000 or so spies inside the building is protected from the prying eyes of hackers who could intercept and remotely view the on-screen data of the computer monitors.
See the MI6 Building by river boat.