I’ve just stumbled across this thread.
My father Joseph Garside (born 1922, died 2002) was a nephew of Ethel Garside. He was the son of Elsie Maude (nee Hughes, died c1960) and Joseph Garside (died 1922).
My father spent holidays on the Wirral (West Kirby) with Ethel when he was growing up in the 1930s. I have a photograph of my father with Ethel in c1937. She must have still been alive in the 1940s as my mother (Margaret, nee Tetlow, born 1925) remembers meeting her when she became engaged to my father in 1946. My mother says she was quite a formidable lady. My mother also says she doesn’t remember when Ethel died as my parents were abroad from 1949 to the mid 1960s.