The Warrington and Newton Railway was a short early railway linking Warrington to the Liverpool and Manchester Railway at Newton, and to pits at Haydock, nearby. It opened in 1831.
The Grand Junction Railway aspired to make its long-distance route from Birmingham to Liverpool and Manchester, and acquire the W&NR so as to use it from Warrington northwards. The permanent way needed to be strengthened for main line use. The GJR opened its line in 1837, connecting at Warrington to the W&NR and gaining access to Liverpool and Manchester over the L&MR. The W&NR was the first part of the present-day West Coast Main Line to be opened.