MI-13

"You never know who is an MI13 contact in Britain. They have eyes everywhere mate."
-Liam Huxley
 
Military Intelligence: Section 13, more commonly known as MI-13, is one of the three main defense agencies of The British Isles, along with the Faeweald-based Majesty's Mages' Circle and the more general Ministry of the Unnatural. 
While the other two primarily focus on in-field activities, MI-13 focuses more on intelligence gathering and crisis management. MI-13 is known for setting up families and individuals of interest in specially chosen homes close to its facilities to better keep an eye on them, the Huxley family being one example.