| Name: | K 23, K 24 & K 25 |
| Type: | Submarine |
| Keel: | n/a |
| Launched: | n/a |
| Completed: | n/a |
| Builder: | Armstrong, Whitworth & Co Ltd |
| Yard: | High Walker |
| Yard Number: | 958, 959 & 960 |
| Dimensions: | 2600disp subm, 1883disp surf, 334.0 x 26.5 x 16.0ft |
| Engines: | 2 x Steam turbines, Parsons type, 10500hp; 4 x electric motors, 1400hp |
| Engines by: | |
| Propulsion: | 2 x Screws, 9.5knots subm, 24.0knots surf |
| Construction: | Steel |
| Armament: | 2 x 1 x 4.0ins & 1 x 3.0ins guns; 8 x 1 x 18.0ins torpedoes, (4 x bow, 4 x beam) |
| History: | |
| British Royal Navy | |
| Order cancelled | |
| Comments: | Member of the Admiralty K Class of steam powered fleet submarines |
| 11/1918: Orders cancelled |