Lack of pedal reflectors isn't so obvious, and I suspect this law isn't so well known. I not just about breaking the law, it's about obviously and blatantly breaking the law.
Pedal reflectors show up very well. They're often the first thing that I notice when I see someone on a BSO at night without lights. They're probably not obvious because hardly anyone has them and all the attention is drawn to whether cyclists have lights or not.
I agree with Andy, that if you shine a powerfull light onto a reflector, I doubt you'd know whether it was a light or reflector especially if it was amongst a vast paraphenalia of reflectors and caught up in the madness. Cars have powerfull lights that easily pick out cycle reflectors.
You and I are breaking the law anyway if using nothng but non BS lights with a steady mode at night on road, even if you only use the flashing mode. But few people know that, so it hardly bothers me.
I think that equivolent European standards are also legal. The German standards, I think, are even higher than BS. They certainly do make some good lights in Germany, such as the Cyo. I think that flashing lights are only legal if there is no other option. Flashing isn't really needed now that lights are much brighter. LEDs used to dim compared to filament bulbs. Now they are much brighter. I'd only use flashing lights in daytime fog now, or if I was worried about my last set of batteries dying before I could get some fresh ones.
But yes, all that anyone (police or moaners) seems to worry about is whether you have lights or not and I use whichever lights are best and don't even think about legality.
Regarding rear versus front: I feel safer with no front light than no rear light. I look where I'm going 99% of the time, so I simply don't procede if I think there's not a high chance that I have been seen. I look behind me less than 1% of the time, so I have to TRUST drivers more not to drive into me from behind.
I agree. If I could only have one light, it'd be a rear. But I think a front light makes the biggest difference. A car headlight can easily pick out an unlit cyclist with no reflectors. But as you say, I'd rather have a light rearwards because I can see where I'm going and it'd be much easier to predict the best way of avoiding a crash. A good front light greatly enhances the ride and avoids a huge chunk of need for evasive action, so that's why I say it makes the biggest difference.