The agency spends quite a lot of time on surveillance in Stoke Newington, the north-west part of Hackney, throughout Troubled Blood. Their subject, nick-named Shifty’s Boss or SB, spends a lot of his time at the home of Elinor Dean.
While we don’t know the name of the street, we do know that Elinor Dean lives within walking distance of a Tesco because Robin follows her on foot to one while on the phone with Strike.
Elinor Dean’s home is Stoke Newington is described as a “nondescript terraced house” and becomes very familiar to both Strike and Robin throughout the book.
Find Stoke Newington on the map below: