Do any British U-class submarines survive, and should Britain have ordered Lembit-type minelayers?
Short answerNo U-class survives; additional Lembit-style boats could have made British offensive minelaying in the Mediterranean much more potent.
NotesLembit is the nearest surviving analogue but is a purpose-built minelayer rather than a U-class submarine. More boats of that type would have allowed British submarines based at Malta to place minefields off Italian ports, compounding the pressure created by fleet and air attacks such as Taranto.