Sorry chaps, it's one of my 'one step forward, two steps back' posts...Well, one step back really...
Despite the rather nice effect I got with my black wash I decided it wouldn't produce the look that I was after. So I started again.
I have started painting flat base coats on the main sections of the vignette, and then I will repeat my black wash - lightly - on top of these.
I will be repainting the street cobbles a darker grey and then the lintels and window-sills a contrasting shade to make them stand out against the buff colour I have painted the walls.