Next Episode of Secrets of the London Underground is
unknown.
Railway historian Tim Dunn and Siddy Holloway from the London Transport Museum explore hidden areas of the London Underground that - despite being just feet away from where millions of people regularly travel - hardly anyone knows about. The pair explore abandoned tunnels, secret bunkers and hidden staircases that have been concealed from public view for years. They will use their unique and privileged access to tell the story of places including London's most clandestine tube station; the former terminus of the world's first electric railway; and a station now only accessible by getting a train driver to stop at just the right place, but which played a key role during the Second World War.
Tim Dunn and Siddy Holloway get incredible access to the maintenance depot at Northumberland Park in north London, responsible for looking after the entire fleet of Victoria Line trains. Tim meets the team checking all the carriages, and sees the incredible precision needed to finely shave the metal wheels to keep them running smoothly on the tracks. Siddy climbs the 1960s control tower and finds a vintage control panel still in working order, directing the points on the track to make sure each Victoria Line train coming into the depot goes to the right place.
Tim and Siddy get to ride on the private service that links the depot with Seven Sisters station - alighting at its mysterious third platform.
At Finsbury Park station on the Victoria and Piccadilly lines, Siddy does a night-time track walk to access the now-disused tunnel which was part of an early experiment to run large electric mainline trains on the tube.
At the London Transport Museum in Covent Garden, Tim meets museum's CEO to hear about the importance of design across the tube network, and they look at the bespoke designs for seating fabric across different underground lines.
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.
Tim Dunn and Siddy Holloway meet at Gloucester Road in London's museum quarter - a station serving the Circle, District and Piccadilly lines.
Tim Dunn and Siddy Holloway explore the unusual station at Old Street, which serves both the Northern line and mainline trains.
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