It depends when you scan, they don't start broadcasting till 10am and 11 am. If you had them before you will get them again.
Thanks, malci. They are back now! I didn't know that a station has to be broadcasting for the scan to work!
Sometimes you don't but it is better to make sure you get them - The best time to do it is about 6.40pm in the evening I find, and if you notice even the adult channels actually broadcast during the day, adverts of course, but it is still a broadcast. EDIT The time is only a personal, choice/opinion