Seven destroyers were lost in the Norwegian campaign, another six in the Battle of Dunkirk and a further 10 in the Channel and North Sea between May and July, many to air attack because they lacked an adequate anti-aircraft armament.
Under felttoget i Norge mistede Royal Navy syv destroyere, andre seks ved Dunkerque og yderligere 10 i Kanalen og Nordsøen mellem maj og juli, mange på grund af luftangreb, fordi de manglede passende antiluftskyts.