All building sites require a careful approach from their workers as do all the telecommunications things that I do in the course of my daily employment. But picture a building site with trains continually running through it… Now there, you have to be really careful!

Bridge rebuilding at West Hampstead - An intermodal service on the North London Line crosses the Midland Mainline.
Bridge rebuilding at West Hampstead – An intermodal service on the North London Line crosses the Midland Mainline.
A local service from Bedford pases under the North London Line on its way to St Pancras.
A local service from Bedford pases under the North London Line on its way to St Pancras.

In response to the Weekly Photo Challenge