Dark o'clock

I noticed earlier on that today is MonoMonday but I didn't find out until I'd already been out to take photos the shop that @StevenG's theme was "organic" , so inorganic is all you get for now and I'll try to get with these newfangled challenges properly next time.

It was much too cold to be standing on a huge metal viaduct when it was -2ºC, and I couldn't work my phone while wearing gloves.  I was only stopped for two minutes and that was too long!  It's a nice study though in the carefully designed beam of my bike's front light.