What you see, whilst train chasing

Dude & I like to go train chasing. It's a term I invented (and used in my story "What We Do Sometimes, Without Thinking") because he likes trains and loves to watch them and I thought calling ourselves trainspotters this early in the day was a bit limiting. But train chasing sounds cool, I think. Anyway, one of our haunts is the bridge on the road that connects Rushton to Pipewell. It's