At Whitechapel station in East London, a major transport hub, the Overground runs beneath the Underground, reversing the usual arrangement. The station houses two Tube lines, the Elizabeth line, and the Overground's Windrush line, but the layout is not what you might expect.
Unexpected Depths: Overground Below Tube
While the Underground is generally thought to run below ground, more than half of its network is actually above ground, including a section over an aqueduct on the Northern line between Finchley Central and Mill Hill East. Conversely, six miles of the Overground's entire length is beneath the ground.
Given this, it's perhaps not surprising that when the two services intersect, they are not always in the expected order. At Whitechapel, passengers must descend further below street level to reach the Overground than to reach the Underground. The Overground platforms are at level -4, while the Hammersmith and City and District line platforms are at level -3.
Whitechapel's Overground History
Whitechapel has been part of the Overground network since 2010. When Transport for London (TfL) gave the Overground distinct line names similar to the Tube, it officially became part of the Windrush line. Today, the Windrush line links Dalston Junction to Crystal Palace and West Croydon via the Thames Tunnel.
Due to the station's existing layout, the Overground had to be positioned beneath the Tube services. The Elizabeth line runs even deeper at level -7, which is logical given it only opened in 2022. The massive escalator ride from the Elizabeth line platform to the main station reflects this depth.
Other Quirks: Canning Town's Stacked Services
Canning Town is another station with an unusual arrangement, owing to its varied history of train services. There, different services are stacked on top of one another. From platform 2, a DLR platform, passengers can look up to see other DLR trains arriving directly above Jubilee line Tube trains below.
These configurations highlight the complexities of integrating new transport links into existing infrastructure, often leading to surprising results for passengers.
