Snow!

A new tip to add to the anti-lean stuff is not to go near the kerb. If there's ice anywhere, it's where the car tyres haven't been... right up against the kerb.

I saw a couple of cyclists leave the centre of the road attempting to undertake and then stack it. But having stayed in the centre I didn't have any problem beyond the road outside of my home.

This is a very good tip and also forms part of the advice given on positioning even for non-icy conditions, as debris generally accumulates where the streets are not swept by car tyres.