On Monday, 10 February 2020 02:09:18 UTC, Marland wrote:


Had an a situation last month in narrow country lane on a filthy night ,

observed a flashing white approaching which while annoying is now accepted
to be the light used by cyclists

Correction, "some cyclists". I am not convinced that flashing lights are a overall benefit. And, even if they are, there should also be a persistent light so that you can locate them between flashes.

But I do tend to use the (of course, non-flashing) front light on my bicycle almost any time I am riding on the road.