Rail historian Tim Dunn and Siddy Holloway from the London Transport Museum, explore the rich history of Stockwell station on the Victoria Line. It was originally the terminus station for the City and South London Railway - the first ever deep level electric tube railway in the world, and the birth of the tube as we know it.?Tim finds evidence of a deep level shelter used by Londoners during the Second World War. On the platforms, he reveals something rather more contemporary - the tiles depicting a swan in homage to a local pub. As Siddy descends deep into the station, she finds metallic tiles on the walls and cast iron segments in a disused lift shaft, each crucial relics of their era.Siddy visits the main depot for the Docklands Light Railway. She hears how they're developing new technology to alert them to any passengers on the tracks. And she gets an exclusive preview of their new fleet of trains, currently on test runs along the network.