The British Isles do have some split-phase supplies (230/460 V) in rural areas and rumour has it the Greater Berlin area had some 115/230 V supplies until very recently, although that might have been a wildly inaccurate description of a 133/230 V 3-phase system. Countries with 16.7 Hz railway power supplies use 231/462 V split-phase supplies for switch track heaters (to keep the points from freezing shut in winter), I have no clue why the inventors of that system chose such a strange nominal voltage.
