I dont know when ITV are ging to show it, but you might want to download the episodes. I do it each week and have just watched episode 4 and it is better than season 1.
I dont know if you were aware, but the American TV network scrapped Jericho after just season 1, but there was such a backlash from the public that it was decided to make a season 2. I dont know for sure, but I heard season 2 will only be about 7 or 8 episode, and then that will be it for Jericho.