NER Class M1
The North Eastern Railway Class M1 is a class of 4-4-0 steam locomotive, designed by Wilson Worsdell. 20 initial engines were built, then 30 further units were built, designated Class Q.
Classification
Classification is complex. The NER initially classified these locomotives "M1" while a variant was classified "M". The compound was later re-classified "3CC" and the "M1" was re-classified "M".Under LNER ownership the "M" became LNER Class D17/1 and the "3CC" became LNER Class D19.
This table summarises LNER classes D17, D18 and D19, which were all very similar:
| Original NER class | New NER class | LNER Class | Cylinders | Driving wheels |
| M1 | M | D17/1 | 19″ × 26″ | 7′ 1¼″ |
| Q | - | D17/2 | 19½″ × 26″ | 7′ 1¼″ |
| Q1 | - | D18 | 19½″ × 26″ | 7′ 7¼″ |
| M | 3CC | D19 | HP 19″ × 26″ LP 20″ × 24″ | 7′ 1¼″ |
- HP = high-pressure cylinder, LP = low-pressure cylinders
Accidents and incidents
- On 4 October 1894, locomotive No. 1622 was one of two locomotives hauling a sleeping car train which overran signals and collided with a freight train that was being shunted at Castle Hills, Yorkshire. One person was killed.
- On 14 February 1927, locomotive No. 1628 was hauling a passenger train that was in a head-on collision with another at station, Yorkshire due to a signalman's error. Twelve people were killed and 24 were injured.
Withdrawal
No D17/1s passed into British Railways ownership. Two D17/2s did but they were withdrawn in February 1948.
Preservation
- D17/1 number 1621 is preserved at the National Railway Museum. It is now currently at the National Railway Museum in Shildon.