buggy behavior around Caledonian Sleeper

[Gaelan]

Describe the bug

The Aberdeen-London Caledonian Sleeper is a nightly service that travels from Aberdeen to Edinburgh, where it merges with the Caledonian Sleepers from Inverness and Fort William before continuing (nominally as the train from Inverness) all the way to London Euston. Edinburgh is a non-public stop, solely to allow the trains to be joined - except on the Fort William portion, passengers are not permitted to board or alight. (At least, that's how it's represented in the UK domestic data - I have no idea how much of this nuance makes it into DB's data.)

Currently, Träwelling displays this as a service from Aberdeen to Edinburgh. There is no way to log the journey between Edinburgh and London, as the Edinburgh-London leg doesn't appear when searching for departures from Edinburgh - presumably because Träwelling (correctly) believes it is impossible to board there.

Steps to reproduce

On any non-Saturday night, search for departures from Aberdeen and select the 21:43(ish) service; due to time zone issues this may display as 20:43. Tonight, it was number 20630, though I'm not sure this is consistent.

Observe that it's impossible to record travel on this service beyond Edinburgh.

Browser console logs

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Browser

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