Royal Navy Submarines U

Ulex (Cancelled)
Unicorn
Unshaken
Upward
(V Class)
(Upholder Class)
(U Class 3rd group)
(V Class)
Ulitmatum
Union
Unsparing
Urchin
(U Class 3rd group)
(U Class 2nd group)
(U Class 3rd group)
(U Class 2nd group)
Ultor
Unique
Unswerving
Urge
(U Class 3rd group)
(U Class 2nd group)
(U Class 3rd group)
(U Class 2nd group)
Umbra
Unison
Untamed
Ursula
(U Class 3rd group)
(U Class 3rd group)
(U Class 3rd group)
(U Class 1st group)
Umpire
United
Untiring
Ursula
(U Class 2nd group)
(U Class 3rd group)
(U Class 3rd group)
(Upholder Class)
Una
Unity
Upas (Cancelled)
Urtica
(U Class 2nd group)
(U Class 1st group)
(V Class)
(V Class)
Unbeaten
Universal
Upholder
Usk
(U Class 2nd group)
(U Class 3rd group)
(U Class 2nd group)
(U Class 2nd group)
Unbending
Unrivalled
Upholder
Usurper
(U Class 3rd group)
(U Class 3rd group)
(Upholder Class)
(U Class 3rd group)
Unbridled (Cancelled)
Unruffled
Upright
Uther
(V Class)
(U Class 3rd group)
(U Class 2nd group)
(U Class 3rd group)
Unbroken
Unruly
Uproar
Utmost
(U Class 3rd group)
(U Class 3rd group)
(U Class 3rd group)
(U Class 2nd group)
Unseen
Upshot
Utopia (Cancelled)
(U Class 2nd group)
(U Class 3rd group)
(V Class)
(V Class)
Undine
Upstart
(U Class 1st group)
(Upholder Class)
(U Class 3rd group)