In last year's edition of the Jack&Grace Cotton Memorial Audax near Bristol (which takes place again next week), there were stretches of 1 or 2 km where there was solid ice across the road and it was carnage. 250 cyclists on narrow country lanes with no pavements.
What I remember most from the experience was walking very gingerly at the side of the road, pushing my bike and trying my best not to slip, while a succession of Range Rovers, Landrovers etc all towing horse boxes sped by at 30-40mph in the opposite direction - only about a foot or two away from a procession of highly vulnerable cyclists either cycling or ,like me, walking. I think they might have been late for a hunt or a point to point event..... or something else horsey that was more important than my life. One tumble from any of us and they would have driven straight over us. No doubt about it. Unbelievable disregard for human life.