So do you go out in poor light to catch something unusual? That’s your choice.

Sometimes I hold off for fine weather or good light to make images. Other times I’m faced with catching something in prevailing conditions. The railway doesn’t run for sunshine.

Once a week Irish schedules an extra IWT Liner (International Warehousing & Transport—Dublin North Wall to Ballina, Co. Mayo). In recent months, this has operated with the elusive container pocket wagons (CPWs). But it doesn’t necessarily run every week.

I have plenty of photos from Islandbridge Junction, and no shortage of images depicting the IWT Liner, and while I’ve photographed the CPWs over the years, last week I knew for certain (that’s railway certain, which is at best uncertain) that the CPWs were on due to pass.

So despite flat light, I made the effort.

Tracking the Light posts every day.