As I have said earlier Teritowelling I can only restate the things I have read (I wasn't there)

However Gary Mead in this biography of Douglas Haig states the rank of Launcelot Kiggell as does Wikipedia (not the best source I acknowledge)

Both sources state his rank as being Chief of General Staff under Haig from late 1915 until 1917 when, as you rightly state, he was dismissed after pressure from Lloyd George.

Keith, fount of all knowledge regarding WW1, stated CATEGORICALLY that he had not ever heard of him. So much for Keith's lifelong study.

Perhaps you would like to read the final line of his inclusion in the attached tome which also states his rank a being Chief of General Staff.

Now, either all these august sources are incorrect or you are.

Kiggell

Just how much do you actually know about the subject I ask myself.