The British-built Canadian Tribals landed their 4 inches guns, and received a pair of QF 4-inch Mk XVI naval guns in twin mounts in the 'A' and 'B' positions instead, improving anti-aircraft capabilities, a pair of Squid mortars for anti-submarine warfare, and a twin 3 inch/50 Mark 33 gun on the 'X' position as an anti-aircraft weapon.