The Railways Act of 1921 brought about the amalgamation of Britain's railways into four large companies, including
the London & North Eastern Railway. This process of 'Grouping' took place on 1st January 1923. A number joint lines
continued to exist after this date. Small and light railways often survived to be absorbed at a later date.
The following pages describe the constituent companies that made up the LNER. Information articles have also been
added. Articles for connecting facilities and private branch lines are located according to geographic provenance.
Click for detailed map
The following companies merged to become the LNER:
The LNER partly owned the following joint companies that continued to exist after the Grouping:
The LNER also absorbed or managed a number of smaller companies: