What makes a “great” British author is subjective and can vary depending on who you ask.
However, generally a great British author is someone who has made a significant impact on literature and has written works that are widely considered to be classics and have stood the test of time.
Additionally, a great British author is someone who may have a unique writing style and voice, and whose works offer an insight into the human experience and capture the essence of the time and place in which they were written.
They may also have a good command of the language, including its idioms, colloquialism and the ability to use it in a way that is both evocative and expressive.
Moreover, a great British author should be able to entertain, educate and enlighten their readers, leaving a lasting impact on them.