The Austerity 0-6-0 Saddle Tanks were introduced by the Ministry of Supply in 1943 to a design by R.A.Riddles. During the following 3 years, 377 of these locomotives were built by a number of independent locomotive manufacturers as detailed below.
| The Hunslet Engine Co. | 120 |
| Andrew Barclay | 15 |
| Robert Stephenson | 90 |
| Vulcan Foundry | 50 |
| Hudswell Clarke | 50 |
| W.G.Bagnall | 52 |
75 of these locomotives were purchased by the LNER in 1946 and classified as J94. They were numbered 68006 - 68080. None survived into preservation. Many of the remaining locomotives were purchased by large industrial concerns such as collieries and steel works for shunting private sidings. Many of these useful locomotives continued working into the 1970s after steam had ceased on British Railways.
An LNER example, 68068 at Gorton Works
| Wheel Arrangement: | 0-6-0 |
| Cylinders (2): | 18in x 26in |
| Boiler Pressure: | 170lbs/sq in |
| Tractive Effort: | 23,870 lbs |
| Power Classification: | 4F |
| Drving Wheel Diameter: | 4ft 3in |
| Weight: | 48 tons 5 cwt |
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