I've got a long black evening dress from Coast, a little bit like this the only real difference is the neck line is cut on the cross and drapes across the boobs, rather than being V neck.
Anyway. Very simple frock. And a bit boring? I've worn it three times now.
Should I bother trying to dress it up with accessories for a bit of variety? And if so, what? I normally just wear a small necklace with it.