140 Gower Street

140 Gower Street, located in London, served as the headquarters for the Security Service (MI5) from 1976 until 1994. Originally a modest three-story building in the late 19th century, it transitioned through various uses, including a secondhand bookshop, before being redeveloped into a ten-story government office building in the early 1950s. After MI5's departure, the site was acquired by the Wellcome Trust in 1998 and transformed into Babcock House. This site reflects a rich history of governmental and literary significance, making it an interesting stop for tourists and researchers alike.