So the ledge in the hallway finally went up! We are yet to arrange the frames, but was so excited, I had to tell you all! The hallway itself is quite thin, but I love "leaning" frames on shelves/ ledges, as opposed to just hanging on the wall. It creates a whole new dynamic.
The hallway is too narrow to put a proper shelf, so we found these ribba ledges from IKEA, which has a little lip at the edge to stop the items falling off.