Doesn't seem to be working too well if you ask me, controllers and pilots getting the words wrong and of course aircraft from other parts of the globe where "cleared ILS" is the standard phrase are just responding "left heading 240, cleared ILS". Some of these replies are being challenged by the controller, to the bemusement of the pilot, and some are not. Once again the UK seems to have created a total mess albeit with the best of intentions, pretty hopeless really.