Thankfully I didn't drive into the back of them. The irritation was that people would take risks on a day that you know is potentially dangerous on the roads. I braked and thankfully was not on ice at the time. Had it been skiddy I would have stood no chance. I have winter tyres on my car but they can only do so much, the idiot didn't know that either. Just be patient, drive slower, don't pull out unless the gap is big. At -5°C it is not as if anyone driving could be unaware of the dangers either.Yikes. Much damage done?