I always wondered why, historically, there was never a single Farnborough station on two levels serving the North Downs and the SWML▸
The Reading, Guildford, and Reigate Railway did try to get a link to the
LSWR▸ main line, so they could run trains from Reading into Farnborough - and a station at the junction was also discussed. However, the LSWR were not keen, as they already had an agreed link with the RGRR at Guildford, and soon after they built their own line from London via Ascot to Reading. Of course they then built a line from Ascot very close to the RGRR (North Downs) line, which did link both ways to the Woking-Farnborough line. Later still there was a chord from the RGRR too, only towards Woking - all these chords have since gone.