Thanks al for the comments. @Ozzie_Traveller, not so much the PP. The lighting was right i.e. slightly overcast and so no strong shadows. Used a polarizer on the camera to kill any reflections in his glasses and the PP was limited to separating him from the BG by inserting a low opacity white layer between the BG and the subject.
Interesting shot with a cinematic feel. I've used a black fill layer to enhance the punch occasionally but for some reason, never experimented with a white layer. Already have ideas swirling.