Starling's solo and shared submarine kills

Which Black Swan-class sloop had the largest submarine kill count?

HMS Starling is the example given, with four confirmed solo kills and eleven joint kills; the ranking depends on how shared attacks are credited.

HMS Starling is credited here with four confirmed solo submarine kills and eleven joint kills. Her totals provide an example, without establishing a definitive ranking for every Black Swan. How much credit each ship receives for a joint attack changes the comparison. The class also helped locate submarines and directed Flower, Castle, River, and Bay-class escorts onto contacts. Those contributions could matter even when another vessel delivered the attack, making a simple list of individual sinkings an incomplete measure of the sloops' work.