I would have thought BS standard would only apply to a UK seller. If I bought an electrical item from Germany, I wouldn't expect it have a UK plug.
Rose could disconnect the brakes, isn't there some amount of self assembly needed with mail order bikes anyway, eg fitting pedals, front wheel etc? Ie they don't arrive ready to ride. Yes, modern brakes with left and right handed levers and "aero" cable routing makes it more complicted.