1802017 said:
Or more precisely a bloke using the road in a perfectly legal fashion with a reasonable expectation that other road users are reasonable people driving in a competent fashion.
Adrian, you are quite right but I'd venture that this may sometimes not be the best way.
I witnessed an accident about two years ago where a motorist just before dusk pulled out on a motorcycle combination which struck his front bumper, sending the rider over his bonnet.
I'd been in a perfect posiion to see the combination but hadn't. He was riding (not long before dusk but in fair visibility) a matt black combo, with black clothing and a black helmet. No lights. All perfectly legal, but in the conditions he was so hard to see that no witness was aware of his presence until a fraction of a second before impact.
I was the first to get to the prostrate rider and thought him dead until I heard a snuffling snore-type sound from behind his visor. The rider was riding
perfectly legally and within the speed limit. The motorist who pulled out on him was driving with caution.
I'm not a faddist for multiple lights and the latest shiny-fandango cyclegear. I frequently ride helmetless. Nonetheless, I do feel some sort of responsibility for giving other road users a fair chance of seeing me.
As a driver and motorcyclist I've frequently seen 'ninja' cyclists far later than I might have. This has been because they were inadequately lit. It is perfectly possible to be driving/rding perfectly legally and at the same time be making it harder than it ought to be for others to see you.
I don't get wound up by ninja riders, but many of us have seen people out there who are loading the dice unhelpfully through their clothing and lamp choices.