Karl Verner Jørgensen was one of the Danish merchant seamen who volunteered for military service during the war. He served in the Royal Norwegian Air Force from 1941 and until the end of the war.
Douglas Svend Fletcher is born in Svendborg, Denmark. He enlists for the Royal Australien Air Force in 1943. I presume he was British and not Danish subject.
A small number of Danes working in the plantation industry in Malaysia in the 1930s volunteers in 1940-41 for the Malayan Volunteer Air Force – a small force that support the allied forces in South-East Asia during the 1941-42 campaign.
The Free Danes in London dreamed of establishing a Danish Spitfire Squadron. In 1941-1942, funds were collected in Danish communities all around the world for the Danish Spitfire Fund. This article tells the story of the Danish Spitfires.