What is the official designation of the building visible from the Morpeth Arms in a manner enabling spying?
SIS Building The SIS Building or MI6 Building at Vauxhall Cross houses the headquarters of the Secret Intelligence Service (SIS, MI6), the United Kingdom's foreign intelligence agency. It is located at 85 Albert Embankment in Vauxhall, a south western part of central London, on the bank of the River Thames beside Vauxhall Bridge. The building has been the headquarters of the SIS since 1994.
Tower viewer A tower viewer is a telescope or binoculars permanently mounted on a stalk. The device magnifies objects seen through its lenses, allowing users to see farther and more clearly than they could with the naked eye or with less powerful viewing devices. Tower viewers are typically metallic and most swivel horizontally and vertically (within given axes of rotation) to permit a range of view. The viewing machines are commonly placed in tourist destinations and scenic lookouts for the purpose of viewing attractions and events of interest; they are also used in residential, business, recreational and government locations for the purposes of surveillance and safety monitoring.