Sooo England - major railway junction between WSW-ENE line and a line running SE or SEE. Teh junction is anot a multiway - the bulk of traffic must originate or be a destination toe the ENE.
If that's London then this must be somewhere West or SW of London - doesn't look like the GWR to Bristol - all the main junctions are in towns.
Suspect it may be down Hampshire Wiltshire way