Metropolitan Board of Works

The Metropolitan Board of Works (MBW) was created in 1855 as the upper tier of local government in the area that later became Inner London, taking charge of public works. The metropolis which the board served included large parts of Middlesex, Surrey, and Kent, lying around the medieval-sized City of London and the larger City of Westminster, and also the areas to the south of the River Thames which were mostly built-up by 1855.

Source: Wikipedia — Metropolitan Board of Works (CC BY-SA 4.0)