- You may be looking for the episode of Ashenden.
Pimlico was an area of London. It was severely damaged during the Blitz.
In the 1950s, the population of Pimlico was relocated so that the area could be redeveloped by the Department of New Towns. The possessed Torchwood Emergency Continuity Board were based there and had potential threats locked away at Pinkerton's Lodging Rooms. (AUDIO: Ashenden [+]Error: Code 2 - no data stored in variables, cache or SMW.)
In mid-2006, after the Northern and Jubilee London Underground lines began to be refurbished, an exponential quantity of still-active Schlechter Wolves were excavated in Bow, Pimlico, Kennington in London. (PROSE: Unexploded WWII Bomb Warnings [+]BBC webteam, U.N.I.T. (BBC, 2005).)