Why Britain gave up conventional submarines

Why did the Royal Navy dispose of its conventional submarines after the Cold War?

Optimistic expectations of lasting peace made the capability appear unnecessary, although the Upholder class was still worth keeping.

The Royal Navy's Upholder class still offered useful conventional-submarine capability and is judged worth retaining. Its disposal nevertheless followed the expected post-Cold War peace dividend. Policymakers anticipated a harmonious order under a dominant United States and saw less need for a mixed submarine force. Understanding that contemporary logic does not require agreement with the capability decision.