LBSCR / SECR Joint Line. Oxted tunnel, south portal (SCU1 @ 19m 08ch), showing drainage channel running parallel to track. May 1884
The photo was taken at about the date the line was opened.
The tunnel is from 17m 64ch - 19m 08ch (1m 501y long), and is also called Godstone or Woldingham Tunnel
ROMA ID: 030687E