Question: In what year did the Britain Burma Society founded under the distinguished patronage of  Earl Mountbatten of Burma, Sir Hubert Rance whose formal prefix Sir was strictly governed by law and custom as an honorific address?
Sentence (from "Britain–Burma Society"): The Britain Burma Society (BBS) is a society founded in 1957 under the distinguished patronage of Earl Mountbatten of Burma, Sir Hubert Rance (formerly Governor of Burma), Miss Dorothy Woodman, the Rt.
Relevant evidence: Yes