The
Great Western Railway adopted the
broad gauge of at the outset, while competing railway companies adopted the gauge of , which later became
standard gauge. As the railway companies sought to expand commercially and geographically, they wished to dominate areas of the country, hoping to exclude their competitors. The networks polarised into groups of
broad gauge companies and of
narrow gauge companies. The term
narrow gauge at the time referred to as well as any smaller size, all narrow relative to the broad gauge (whereas today it refers only to
gauges strictly smaller than). Proposed railway lines required authorisation by
act of Parliament, and an act generally stipulated the track gauge for that line. When an independent line was promoted, the gauge used aligned the company to either the broad or narrow gauge companies. The success by one network and the failure by the other often implied the capture and loss respectively of territory far beyond the line under immediate examination. == Resolution ==