H&S▸ Comment: Not good practice using a mobile at the top of a fairly tall ladder.....
I had the very same thought when I saw that photo!
I'm no structural engineer, but that looks like a pretty severe failure to me. Looking at google maps, I think it is the first of the bridges (travelling towards Bristol from Cam & Dursley) taking the railway under the A38.
I do like the rather unusual corner bricks, unless what I'm seeing is an effect of perspective...