 Like other British flotilla leader designs, these ships were significantly larger than the typical destroyers of the day, in order to accommodate the flotilla staff ("Captain (D)" in Royal Navy parlance) and the necessary additional signalling gear.All ships had four funnels, the foremost being taller (although it was later cut down post-war in "Nimrod" and "Abdiel").They were armed with four QF 4 inch guns.