They were eventually accepted into the Royal Navy and met all their design requirements although having a low level of underwater endurance.
All four were taken out of service in 1919 and broken up (1920 - 1921), after the First World War.
|V1, V2, V3, V4||Vickers, Barrow-in-Furness||1914 - 1915|
|Displacement (tons):||V1:||386 sf
Vickers diesels 900hp.
2 Electric Motors 450hp.
|Speed (kts):||14 sf
|Oil Supply (tons):||na|
|Armament:||2 x 18
inch tubes (bow).
1 x 12pdr gun.
50 nm at 5 kts sm
|Complement:||20 Officers and Ratings.|