Of course, being a real English gentleman is not just a matter of behavior. Anyone can learn how to choose the right color for handkerchiefs or how to address bishops correctly. In order to be worthy of the title of "gentleman", you need to be trained from birth.
Born in upper-class parents, brought up by suitable nannies, and enrolled in one of the few schools, you need to cross the minefields of Oxford and Cambridge University, private clubs and foreign travel next. Your choice of hobbies, wine, dog, horse and wife (in this order) will fully explain whether you are suitable for this role. You need to cultivate perfect manners, merciless expression and a strong sense of fair competition. You will have money but don't mention it, you will love your country but don't show it off, and you will always dress up beautifully but not conceited.
English gentleman was born in18th century. He may have reached his peak in the early 20th century, but now he seems to be an endangered species.
Born on this coast? There is no coast in my heart.
In the vast universe, in the long river of years, we were born in this era, impartial, unhurried, born in our own era.