The GNR Class N2 is an 0-6-2T side tank steam locomotive designed by Nigel Gresley and introduced in 1920. Further batches were built by the LNER from 1925. They had superheaters and piston valves driven by Stephenson valve gear.  Some locomotives were fitted with condensing apparatus for working on the Metropolitan Railway Widened Lines between King's Cross and Moorgate.

The N2s were designed for suburban passenger operations, and worked most of the duties out of King's Cross and Moorgate, often hauling one or two quad-art sets of articulated suburban coaches. These ran to places such as New Barnet and Gordon Hill on the Hertford loop. They also hauled some empty coaching stock trains between King's Cross and Ferme Park carriage sidings.  They were also a common sight in and around Glasgow and Edinburgh operating suburban services, mainly on what is today known as the North Clyde Line.

107 were produced. The first withdrawal was in 1955, and another the following year, but official withdrawals didn't start until 1957. Many of their later duties included standing-in for diesel failures and station pilots. The last thirteen N2s were withdrawn in 1962. 1 has been preserved.