The Totals are
Number of U Boats sunk by the Sunderland 27
Number of U Boats sunk by the Catalina 37
I thought i was going to have to troll through an entire website about U Boats, when they were sunk and by what to find the Info, but the Info I required was part of an Aicraft History Section within the main site, which covers all Aircraft used in the battle of the Atlantic.