I'm sure Forest have dabbled with a shop in town in the past, I could be imagining it though - but was it on Clumber Street?
Renting a decent site would be pricey, so they'd need to be confident it would make plenty of cash above and beyond what it would cannibalise from the City Ground shop. I'm not sure it would with Forest at their current standing - if they were able to claw their way up to the top flight then it might be worthwhile to cash in on tourists.
Currently I doubt many tourists would buy a Forest shirt.
can't remember seeing any Forest stuff in there Joe - loads of Robin Hood tat and some hoodies so you can pretend to be a NTU student but that's about it