When did the Royal Navy know for certain that HMS Glowworm had been sunk?
Short answerHMS Renown is identified as the ship that confirmed Glowworm's loss.
NotesHMS Renown is identified as the ship that confirmed Glowworm had been sunk. This places Renown's later aggression within a sequence in which the loss of a British destroyer was already known. The reporting mechanism is not specified. No more exact confirmation time is given.