A tailor made blues (No. 1s) coat for a British Army Officer. All insignia have been removed. No. 1 Dress, or "dress blues", is a ceremonial uniform, worn on only the most formal of occasions and by senior staff officers, aides to the Royal Family, and to the personal staff of senior officers in command. It is not generally issued to all units, with the khaki No. 2 Dress functioning as the main parade uniform.