In the U.K., the fold-flat seat was standard I believe. It certainly was on my previous MY13 SE lux, and is on my MY16. Power seats may be a different matter however.
Interesting - we had to specify the fold-flat seat (it was a must for me because of my habit of carrying longish bits of wood). I can't imagine a power seat being fold-flat, but perhaps that's a failure of imagination on my part!