Safe House - London
Barley being trained in aspects of spycraft by Ned (James Fox), of British Intelligence - Using a single sheet of paper on a hard surface, if writing things down.
I presume that the safe house is located in this street but I cannot confirm this. In this scene, there are ornamental railings on a balcony outside the window, on the building opposite, I think, which correspond with a building at the end of this street on Sloane Square.
“If we trust the motive, we can trust the man, we can trust the material”