John Dickson Carr
30 November 1906 – 27 February 1977
John Dickson Carr was a very highly regarded American mystery writer, though he lived for most of the '30s and '40s in England, married there and set many of his books there (Wikipedia). His two main detectives, Dr. Fell and Sir Henry Merrivale, were very English (Wikipedia).
The hollow man
The Exploits of Sherlock Holmes
Hag's Nook
The Crooked Hinge
Death-Watch (A Dr. Gideon Fell Mystery)
The Case of the Constant Suicides
Below Suspicion (Gideon Fell Mystery Series)
He who whispers
The Curse of the Bronze Lamp
The door to doom, and other detections
The sleeping sphinx
Senior Sleuths