I do not quite understand this thread. As far as I know, in UK, Monochrome photography is the right term, and the US English term is Black and White, or it may be other way around. Literary cross pollination has made Black and White the dominant term.
My key darkroom instruction manual was called "Ilford Monochrome Darkroom Practice" by Jack H. Coote. But Ilford have always written "Black and White Film" on their film boxes.
As the cultural warriors have not exercised themselves with this aspect of photography yet, we can relax, and not bother ourselves with photographic Newspeak.