Yes, the government responded (a few days ago now actually, but I only just got around to posting this). I won’t copy their email here, because publishing communications from the Information Commissioner’s Office without their permission probably isn’t the smartest thing to do, but the gist of their message was an entirely friendly admission that yes, they aren’t entirely compliant yet. They’d like to be, but there’s still work to be done and they’ll be doing it over the forthcoming months. In particular they said they’d address the lack of cookie information on their notification form as a priority. So ho hum, how boringly reasonable of them!