The Metropolitan Railway K class consisted of six 2-6-4

2-6-4

Under the Whyte notation for the classification of steam locomotives, a 2-6-4 locomotive has two leading wheels, six coupled driving wheels and four trailing wheels...

T steam locomotives, numbered 111 to 116. They were built by Armstrong Whitworth

Armstrong Whitworth

Sir W G Armstrong Whitworth & Co Ltd was a major British manufacturing company of the early years of the 20th century. Headquartered in Elswick, Newcastle upon Tyne, Armstrong Whitworth engaged in the construction of armaments, ships, locomotives, automobiles, and aircraft.-History:In 1847,...

 in 1925 using parts manufactured at the Royal Arsenal

Royal Arsenal

The Royal Arsenal, Woolwich, originally known as the Woolwich Warren, carried out armaments manufacture, ammunition proofing and explosives research for the British armed forces. It was sited on the south bank of the River Thames in Woolwich in south-east London, England.-Early history:The Warren...

, Woolwich

Woolwich

Woolwich is a district in south London, England, located in the London Borough of Greenwich. The area is identified in the London Plan as one of 35 major centres in Greater London.Woolwich formed part of Kent until 1889 when the County of London was created...

, to the design of the South Eastern and Chatham Railway

South Eastern and Chatham Railway

The South Eastern and Chatham Railway Companies Joint Management Committee , known by its shorter name of the South Eastern and Chatham Railway was a working union of two neighbouring rival railways, the South Eastern Railway and London, Chatham and Dover Railway , that operated services between...

 N Class

Southern Railway N Class

The SECR N class was a type of 2-6-0 steam locomotive designed in 1914 by Richard Maunsell for mixed-traffic duties on the South Eastern and Chatham Railway . Built between 1917 and 1934, it was the first non-Great Western Railway type to use and improve upon the basic design principles...

 2-6-0

2-6-0

Under the Whyte notation for the classification of steam locomotives, 2-6-0 represents the wheel arrangement of two leading wheels on one axle, usually in a leading truck, six powered and coupled driving wheels on three axles, and no trailing wheels. This arrangement is commonly called a Mogul...

 locomotives. The boilers had been made by Robert Stephenson and Company

Robert Stephenson and Company

Robert Stephenson and Company was a locomotive manufacturing company founded in 1823. It was the first company set up specifically to build railway engines.- Foundation and early success :...

 of Darlington.

The K Class were used on heavy freight trains along London's

London

London is the capital city of :England and the :United Kingdom, the largest metropolitan area in the United Kingdom, and the largest urban zone in the European Union by most measures. Located on the River Thames, London has been a major settlement for two millennia, its history going back to its...

 Metropolitan Railway

Metropolitan railway

Metropolitan Railway can refer to:* Metropolitan line, part of the London Underground* Metropolitan Railway, the first underground railway to be built in London...

 mainline, including coal to the power station at Neasden

Neasden

Neasden is an area in northwest London, UK. It forms part of the London Borough of Brent.-History:The area was recorded as Neasdun in 939 AD and the name is derived from the Old English nēos = 'nose' and dūn = 'hill'. It means 'the nose-shaped hill' referring to a well-defined landmark of this area...

, although there were used on occasional passenger trains. In 1937, all six were transferred to the London and North Eastern Railway

London and North Eastern Railway

The London and North Eastern Railway was the second-largest of the "Big Four" railway companies created by the Railways Act 1921 in Britain...

(LNER) where they were based at Neasden (LNER) Shed. The LNER numbered them 6158–6163 and classified them as L2 class.

All were withdrawn and scrapped between 1943 and 1948.