Well I've commuted everyday this week and managed to stay on. This morning and last night was a struggle on the cycle path, the snow has become that frozen it is hard to break a way through it so gave up and went onto the road.
I've found that the best way is to start in a lower gear than normal, find a pace your comfortable and feel safe with, initially your back wheel may have a tendency to spin or slide sideways on occasions but just change up a gear and keep the same pace untill you find a gear where all the sliding etc stops. If you go past the sweet spot though it then becomes a struggle to push through the snow unless you speed up which makes it become a bit dodgy.
Tried a different pair of gloves instead of the
Altura Night Vision and found them far better. "Alpinestar chill", there designed for moto cross etc but
Chain Reaction sell them for MTB riders. I've had mine a long time but never liked them because they are a tight fit. But yesterday and today I found out how good they are, my hands were warm to start with and throughout the ride unlike the Night visions, plus the liner is sewn in.