I wonder if I've spotted a trend? I noticed a female cyclist around Mortimer Street (W1) wearing what at first sight looked like a riding helmet. On closer inspection (we'd stopped at lights!) it turned out to be a cycling helmet, I think, which just looked a lot like a riding helmet. I've done a bit of research on the net and I couldn't find the exact model. But it has made me now question whether it might really be a riding helmet, as plenty of the new riding helmets for being on horses, look like more like cycling gear. If you see what I mean.
Further proof of the trend was noticing another cyclist wearing what can only be described as long black ... wait for it ... riding boots. Again, you could argue that she was just wearing nice black boots, but it did make her look a bit like she was about to do riding.
Anyway, here's a bit of evidence that people are trying to make riding helmets look a bit more like "normal" hats - the company is called Yakkay
It's called The Horse Riding Clothing and Saddle Blog
Final thought - do you think you could ride on a bike using a bowler hat for safety?