HMS Walrus (S08) was the last of the Porpoise class submarines of the Royal Navy.

[1] On one occasion during exercises with HMS Ark Royal (R09) an error resulted in a practice torpedo becoming embedded in the submarine's casing.

[2] Following an 18-month refit at Devonport Dockyard she commissioned for the third time on 3 December 1969.

In 1970 she was present at Portsmouth Navy Days[3] Walrus also attended the 1977 Silver Jubilee Fleet Review off Spithead when she was part of the Submarine Flotilla.

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