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.
The Castle (Saint Helena) The Castle is the main government building of the British Overseas Territory of Saint Helena, Ascension and Tristan da Cunha, located in Jamestown on the island of Saint Helena. A Grade I-listed building, the oldest parts of the complex date to 1708, but it was largely reconstructed in the 1860s because of termite damage. It does not have the appearance of a typical castle, though historically the site was part of the East India Company fortifications of Jamestown.