I too am searching for information on a branch of Sandovers in BC. But I don't have much to go on.
My Smith cousin, Marie Smith (I believe her real name may have been Marjorie-- I'm trying to confirm that), married a man with the last name of Sandover, but I have no first name. They divorced, probably in the late 1920s or early 1930s, and I think they had 1 son whose name was Norman, born approximately October 1923.
I have been searching for information on him based on some old letters. I am going to Alberta soon to communicate with others from this same family branch, so if I find any more information, I will post it here.