Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 132,777 pages of information and 210,006 images on early companies, their products and the people who designed and built them.
Under the Railways Act 1921 the majority (123) of the railway companies in Great Britain (and few in Northern Ireland) were grouped into four main companies, often termed the Big Four: the grouping took effect from 1 January 1923.
Over fifty railway companies were not covered by the Grouping. Those in the following list were those organised on an independent basis, usually providing locomotives and rolling stock also. They are included under classification headings.
Joint Lines were wholly owned by two or more other companies. If not all of the owning companies went into the same group then the joint company could not be grouped. Joint lines did not always operate any services: they owned the track, stations etc and the services were operated by one or more of the parent companies:
These are those in which the Group companies only are concerned:
Electric or electric and steam lines
Other electric/steam railways
Light and similar railways (standard gauge)
Light railways (other than standard gauge)
Railways outside the jurisdiction of the UK Parliament
Miscellaneous railways The railways included in this section were standard gauge, unless otherwise noted: