Undaunted spent much of her short career operating in the Mediterranean.

She was due to return to Malta on 11 May but she failed to do so and is presumed lost on mines.

It is also possible that she was sunk by the Italian torpedo boat Pegaso, which had sailed from Tripoli on the 12th.

Against this theory is the fact that by that date Undaunted should have been back at Malta, but it is possible that a decision to remain at sea longer had been taken, or that she had suffered mechanical problems preventing her return.

It is also possible that she was sunk by the Italian torpedo boat Pleiade off Tripoli on the 13th but this is not very likely.