Master Keaton Remaster

From Baka-Updates Manga:
The main character is the son of an English woman of noble birth and a Japanese zoologist. Keaton went to England at the age of five with his mother after his parents' divorce. There he learned archeology at Oxford University, where he met his wife with whom he has a daughter, Yuriko. They divorced after five years. He works as an operative/detective for Lloyds of London where he's known for his abilities he acquired as a master sergeant in the SAS and as a veteran of the Falklands War, and was one of the members of the Iran Embassy incident. This helps him carry out his dangerous work of insurance investigator.