Beware that some regional versions of ITV1 on SD have disappeared because ITV is concentrating it regional service on HD, and leaving only a few SD regions (you choose the one closest to you, even if it's not "your" region). I fell foul of this a month ago when SD versions of ITV Yorkshire (East and West) disappeared. ITV (Granada) is now my closest.
The situation seems to be changing day by day, rather than being one huge change and then it's all over. Existing SD and HD versions of ITV are moving from one transponder to another. It's not so much a case of "the old services are still active"; it's more that the old ones still have the service name "ITV" (etc) and the new ones (at present) have the service name of the SID (eg "1234" rather than "ITV"). I presume at some later stage the old version will disappear and the new one will be called "ITV" / "ITV2" / "ITV4" etc. I asked what woudl happen if I set the old and new instance of ITV services as both being members of the channel "ITV", and whether this would give a seamless changeover - but no-one's replied to my thread.
