1856 13 Nov. 3/2 An act empowering the construction by the Company of a relief line, between Lewisham and Dartford Stations.
1898 23 Nov. 5/1 The new station..will consist of an island platform placed between the up and down relief lines.
1999 (Nexis) 18 Oct. The train had been diverted to a relief line, parallel to the main, to let a fast mail pass.