Successors
The LNWR became a constituent of the London, Midland and Scottish (LMS) railway when the railways of Great Britain were merged in the grouping of 1923. Ex-LNWR lines formed the core of the LMS's Western Division.
Nationalisation followed in 1948, with the English and Welsh lines of the LMS becoming the London Midland Region of British Railways. Some former LNWR routes were subsequently closed, notably the lines running East to West across the Midlands (e.g. Peterborough to Northampton and Cambridge to Oxford), but others were developed as part of the Inter City network, notably the main lines from London to Birmingham, Manchester, Liverpool and Carlisle, collectively known in the modern era as the West Coast Main Line. These were electrified in the 1960s and 1970s, and further upgraded in the 1990s and 2000s, with trains now running at up to 125 mph. Other LNWR lines survive as part of commuter networks around major cities such as Birmingham and Manchester.
Read more about this topic: London And North Western Railway