Couple of you tubes from the DSA
In icy conditions it can take 10 times longer to stop.
Drive slowly, plan ahead, gentle acceleration and breaking and if the news is saying dont travel unless you have to then DONT TRAVEL UNLESS YOU HAVE TO
If you HAVE to remember pack warm clothing and something to clear the snow.
Make sure and clear ALL your windows of ice, have a full tank of petrol and give yourself plenty of extra time for the journey.