GNR Classes H2 and H3

The Great Northern Railway class H2 and H3 (classified K1 and K2 by the LNER) was a class of 2-6-0 steam locomotive designed for mixed-traffic work.
The class was created as a locomotive which could haul heavier goods trains at speeds of up to 40 mph. The class were later developed into the more powerful H4 (LNER K3) class. After formation of the London and North Eastern Railway, the type became known as class K1 and K2 and was adopted as an LNER standard design. They got the nickname "Ragtimers" because of their lively nature when running at speed and their use of Walschaerts valve gear which was uncommon on the GNR at the time. 
The ten K1s were built at the GNR's Doncaster Works in 1912–1913, to the design of Nigel Gresley. Five batches of K2s, also to the design of Gresley, were built at Doncaster, the North British Locomotive Company, and Kitson and Company between 1914 and 1921. These were the first design to incorporate Gresley's patented double swing link pony truck design. They were excellent mixed-traffic locomotives, but began to be displaced by the larger and stronger K3s. They were moved to former Great Eastern and North British lines to supplement existing engines. Twenty K2s were fitted with Westinghouse pumps so they could pull passenger trains from Liverpool Street on the Colchester and Cambridge lines. 
REBUILDINGS:
No. 4635 was rebuilt from K1 to K2 in 1920. No. 4631 was rebuilt in 1921. No further K1s were rebuilt until 1931, when a shortage of K1 boilers necessitated rebuilds. The remaining eight were rebuilt between 1931 and 1937, making the K1 class extinct.
Numbering:
The K1s were numbered 1630–1639 by the GNR, and became LNER 4630-4639. The K2s were numbered 1640–1704 by the GNR, and became LNER 4640-4704. In the LNER's 1946 renumbering program, the K2s were renumbered 1720–1794, and they later became British Railways 61720–61794.
Names:
None of the K1s were named. However, some of the K2s based in Scotland received names in 1933–34.
hideNumber	hideNumber	hideNumber	
LNER 	LNER 1946 	BR 	
4674 	1764 	61764 	Loch Arkaig
4682 	1772 	61772 	Loch Lochy
4684 	1774 	61774 	Loch Garry
4685 	1775 	61775 	Loch Treig
4691 	1781 	61781 	Loch Morar
4692 	1782 	61782 	Loch Eil
4693 	1783 	61783 	Loch Sheil [sic]
4697 	1787 	61787 	Loch Quoich
4698 	1788 	61788 	Loch Rannoch
4699 	1789 	61789 	Loch Laidon
4700 	1790 	61790 	Loch Lomond
4701 	1791 	61791 	Loch Laggan
4704 	1794 	61794 	Loch Oich
Category:Steam locomotives
Category:Locomotives
Category:Tender locomotives
Category:Six-coupled locomotives
Category:2-6-0 steam locomotives
Category:2-6-0 locomotives
Category:Standard gauge locomotives
Category:Standard gauge steam locomotives of Great Britain
Category:4 foot 8 1⁄2 inch gauge
Category:LNER locomotives
Category:Great Northern (UK) locomotives