This is one of my city and guilds level two submissions based on film noir and film stills.
Strobist information: Subject exposed to remove ambient light from the window.
Single Canon EX430l hand held by an assistant aiming the flash at the model from outside. Flash held above subject and just left of camera.
Another version can be seen following the link: goo.gl/lLYhNN
I would be interested to know your preference.