Somewhat different version?
HMS Seal, Cmdr. R.P. Lonsdale
On a mission to mine Kattegat, did deploy mines, but was spotted and depth bombed. Actually went to sea floor, but crew managed to surface and attempt a run for Sweden.
Spotted by seaplane and run down by (pre-war) trawler Franken/UJ 128.
Capitulated
From U-Boat.net

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Morbius, Morbius! Something is approaching from the Southwest. It is now quite close.