I don't use Yodel.
Signal Instruction 39 C.D. Coulsdon North, Redhill, Crawley and Preston Park
Signal Instruction 35CD (1983): Coulsdon North, South, Merstham and Redhill
Signal Instruction 35CD (1983): Coulsdon North, South, Merstham and Redhill; VG+
BR(S) signalling notice East Croydon North Box and Coulsdon North Box 1955
1983 Coulsdon North Purley Signalling Signal Box Sidings Railway Plan Diagram
1932 Southern Railway Coulsdon North Signal Box Signalling Diagram
