| Powertype: | Steam |
| LNER Class K5 | |
| Designer: | Edward Thompson |
| Builddate: | (rebuilt) 1945 |
| Whytetype: | 2-6-0 |
| Driverdiameter: | 5inchesft8inchesin (ftin) |
| Locoweight: | 71.25LT |
| Fueltype: | Coal |
| Cylindercount: | Two, outside |
| Cylindersize: | 20inchesx26inchesin (xin) |
| Boilerpressure: | 225psi |
| Tractiveeffort: | 29250lbf |
| Powerclass: | BR: 6MT |
The London and North Eastern Railway Class K5 consisted of a single rebuild of LNER Class K3 2-6-0 No. 206 (later No. 61863), rebuilt in 1945 by Edward Thompson. The rebuilt locomotive had a new boiler and two cylinders instead of three, following earlier rebuilds of other Gresley designs. The aim of rebuilding was to achieve high tractive effort by raising boiler pressures and using two large cylinders for ease of maintenance, as well as greater availability. The K5 was withdrawn and scrapped in 1960.
