Hello Andrew,
If I may offer one matter that seems a bit unsettling about this project's title.
"Hidden Manchester" strongly suggests a photojournalism project that pokes a lens into unseen places and offers a degree of visual and perhaps textual exposition about them. What I think most people would expect to see under such a title would be relatively straight, skillful photographs of Manchester's shadows and underbelly. (We have several such books of works about Chicago.)
Yet what you're presenting is something completely different. These are not documentary images and there's absolutely no evidence of exposition. Rather, you're presenting highly color-cooked ad-style scenes that have about as much relation to Manchester as to Paris, New York, or Warsaw. The scenes seem to have been selected primarily for their pliability in Photoshop rather than for their obscurity or interest to viewers.
I see that in your self-statement you state:
“The crucial element to my work is atmosphere…. No matter how much digital application is going on, the atmosphere and feel of a picture is always the most important thing.”
These images certainly follow suit with your philosophy.
So here's my point and suggestion: Be honest and be frank. If you want to present highly styled and manipulated images, consistent with your existing oeuvre, by all means do so. But lead thematically with the fact that these are principally works of digital artistry based on photographs which, oh by the way, happen to be of places on the planet that you'll probably never see.
Just my immediate thoughts and opinion for whatever they may be worth.