The London and North Eastern Railway (LNER) Class O4 initially consisted of the 131 ex-Great Central Railway (GCR) Class 8K 2-8-0 steam locomotives acquired on grouping in 1923. The engines were designed by John G. Robinson and built at …

As the 04, it would become the most numerous of LNER heavy goods locomotives. The LNER examples would experience many rebuildings and reboilerings, but many survived in their original form until British Rail (BR) withdrew them in the 1960s.

The first GCR 8K (LNER O4/1 class) class locomotive (966) was built in September 1911. A superheated boiler was fitted of similar size to that used by Robinson on his C4 Atlantics. A leading pony truck was fitted to take the extra weight.

The O4 locos served widely throughout the LNER system, many being modified to help extend their useful working life on heavy freight trains. Fifty-eight of the class were rebuilt into LNER Thompson Class O1s in 1944–49. 329 LNER O4 locomotives passed to British Railways ownership in 1948.

The London and North Eastern Railway (LNER) Class O4 first consisted of 131 ex-Great Central Railway (GCR) Class 8K 2-8-0 steam locomotives acquired on grouping in 1923. Designed by John G. Robinson the engines were built at the GCR locomotive works at Gorton, Manchester.

The LNER Class O4 initially consisted of the 131 ex-GCR Class 8K 2-8-0 steam locomotives acquired on grouping in 1923. The engines were designed by John G. Robinson and built at the GCR's Gorton Locomotive Works, Manchester.

A number of different numbering and classification schemes were used for the locomotives owned by the London and North Eastern Railway (LNER) and its constituent companies. This page explains the principal systems that were used.

The London and North Eastern Railway (LNER) Class O4 initially consisted of the 131 ex-Great Central Railway (GCR) Class 8K 2-8-0 steam locomotives acquired on grouping in 1923. The engines were designed by John G. Robinson and built at …

Designed by Robinson of the Great Central Railway for heavy fright work and introduced in 1911 a quantity 130 were built up to 1920. The design was adopted by the Railway Operating Division (ROD) of the Royal Engineers who ordered 521 locomotives which were built …

the LNER O4, previously known as the GCR 8K class, was a series of 421 locomotives built between 1911-1918 for various railways. Four examples are preserved today. 3 of the 4 preserved O4s are in preservation in Australia.