Hello,

Thanks, I have a very good copy of the London A-Z (circa 1983) which shows the LU tracks in tunnel as dotted lines.

Unfortunately, being from that period, the Jubilee line extension is not there and some sections of other lines just don't show up so there was an element of educated guesswork as well.

That Quail Map Company also produced (and possibly still does) a track diagram for the network; whilst it doesn't show the geographical location of lines, it does show where one crosses another, which is helpful.

Let me know if you find any inaccuracies or know of other data sources...

Cheers,

Simon.