61.2%
It doesn't recognise Fenchurch Street as a station.
Fenchurch Street is national rail, not on the TfL network, which is what this covers. (Minor pedantic point of order re the thread title: DLR, Overground* and Elizabeth line are not “London Underground”, they’re separate modes.)
DLR is my Trojan heel.
I used to know all of the DLR but it has expanded a lot since I lived on the Isle of Dogs and used it regularly.
Most of the Overground is unknown to me (I moved out of London before it existed) and I only know the central section of the Elizabeth line.
Glad they didn’t include Trams.
As for the actual Underground lines… well, this is highlighting how little I know north and west London and/or how little I travel in London. Got up to 56% quite quickly but will struggle to get much further.
As is my knowledge of Greek mythology.
*Overground is actually made up of six lines which are currently going through the process of being given separate identities to make it all less confusing for people trying to navigate it.