The NER Class O was a class of 0-4-4T steam locomotive

Steam locomotive

A steam locomotive is a railway locomotive that produces its power through a steam engine. These locomotives are fueled by burning some combustible material, usually coal, wood or oil, to produce steam in a boiler, which drives the steam engine...

s of the North Eastern Railway

North Eastern Railway (UK)

The North Eastern Railway , was an English railway company. It was incorporated in 1854, when four existing companies were combined, and was absorbed into the London and North Eastern Railway at the Grouping in 1923...

,Ian Allan ABC of British Railways Locomotives, 1948 edition, part 4, page 44http://www.lner.info/locos/G/g5.shtml designed by the company's Chief Engineer, Wilson Worsdell

Wilson Worsdell

Wilson Worsdell was a British locomotive engineer who was locomotive superintendent of the North Eastern Railway from 1890 to 1910. He was the younger brother of T.W. Worsdell.-Family:...

. They all survived into British Railways ownership in 1948 and their BR numbers were 67240-67349. They were withdrawn between 1950 and 1958.

Preservation

None of the G5s was preserved, although a new build is in the works at Darlington.http://www.g5locomotive.co.uk/ Despite other locomotive project being classified as "New Builds", this one is destined to be a replica of original class member No. 1759.