Automatic signalling, using two-position signals, was provided in September 1919. The line also had sidings serving the Newmarket sale yards and other industries, and the line was operated as a siding most of the time, the points being connected to adjacent point levers and the signals being put out of use. When passenger services were operated on the line, the points were connected to the signal boxes and the signals were brought into use. This arrangement finished in the 1980s or 1990s when the sidings were closed.