Znebula·NebulabyZagorath Tom Scott: England — Pulling the lever is the easy part.In Lancashire, at National Rail's Manchester signalling classroom, I learn why it's very, very rare for trains to collide... and then go to an actual, live signal box to see it for real.https://nebula.tv/videos/tomscott-pulling-the-lever-is-the-easy-partOpen linkView original on quokk.au9Comments