| Powertype: | Steam |
| Designer: | Vincent Raven |
| Builder: | NER Darlington |
| Builddate: | 1913, 1920—1922 |
| Totalproduction: | 45 |
| Whytetype: | 4-4-4T |
| Leadingdiameter: | 3feet |
| Driverdiameter: | 5feet |
| Trailingdiameter: | 3feet |
| Wheelbase: | 34inchesft6inchesin (ftin) |
| Locoweight: | 87.35LT |
| Fuelcap: | 4LT |
| Watercap: | 2000impgal |
| Cylindercount: | three |
| Cylindersize: | NaNx |
| Firearea: | 23square feet |
| Boilerpressure: | 160psi |
| Tubearea: | 654.24square feet |
| Fireboxarea: | 124square feet |
| Totalsurface: | 1252.974square feet |
| Fluearea: | 280.6square feet |
| Superheaterarea: | 194.13square feet |
| Superheatertype: | Schmidt |
| Tractiveeffort: | 22940lbf |
| Valvegear: | Stephenson |
| Operator: | North Eastern Railway, London and North Eastern Railway |
| Retiredate: | 1931-1936 |
| Disposition: | All rebuilt to LNER Class A8 |
The North Eastern Railway Class D (later London and North Eastern Railway (LNER) Class H1) was a class of 4-4-4T three-cylinder side tank steam locomotive designed by Vincent Raven in 1913.[1] They were used for rural passenger services. Forty five were built in total; a first batch of twenty, then a further twenty five after the War.[2]
Between 1931 and 1936, all of the LNER H1 class were rebuilt with a 4-6-2T wheel layout and re-classified as A8.[3] They were scrapped between 1957 and 1960.[3]