In a change to the published schedule, #RailNatter is heading to London because Crossrail (known by some as the Elizabeth line line) has just opened and we all need to talk about it... Not least that it (a) is not a Tube line and (b) has made a right mess of an already over-stressed Tube map.

We'll be talking about how to properly classify London's transport networks, why it may or may not be important to do so, and how fixing the Tube map is important and also almost impossible.

Join LIVE at 7pm on Wednesday!

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