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Cocobunny, I've just had a quick check and they all seem to be mentioned on the Wiki page, the page featuring the main train route. That route is the 4,2,8 Line (and the 4,2,8 is an entry/entries in the crossword too).

Thank you so much Malone xx

Cocobunny, glad I could help. I no longer have my copy, so couldn't be 100% sure of all the details - but thought you'd manage from there.