His mother was Scottish Violet McHutchen and his father was Ossian Donner, who headed Finland's first diplomatic mission in London 1919 to 1925.
The papers of Sir Henry Maxence Cavendish Drummond Wolff appear to indicate that Sir Oswald Mosley interviewed Donner to decide upon his suitability to serve as MP for the Basingstoke constituency, which had previously been held by two fascists, Drummond Wolff and Viscount Lymington.
[1] Donner also featured as writer for New Pioneer, an anti-Semitic and pro-German journal bankrolled by Lymington and closely linked to the British People's Party.
[2] In Parliament, Donner was active on British Empire and Indian policy, playing an important part in the India Defence League.
He served in the Royal Air Force during World War II and was knighted in the 1953 Coronation Honours List.