Maybe. However, it might not be out of alignment. Some channels were put on the UK spot beam so they aren't received outside of the UK.
It is important to distinguish between picture quality and signal quality. If you are not getting sufficient signal, you will get picture breakup or certain segments of it freeze until it catches up.
Not all ITV SD channels are closing. You will probably have to make your own channel/favourite list with the viewable HD channels. Hopefully your equipment allows you to do this