Have you found a connection with the adoptive family Charles who I think may be Charles R W Kemp?
Annie
To be honest, I didn't quite understand the question since all that is really known is that her adoptive father was named Charles Kemp and that in 1939 Frances Dorothy was living in Plymouth.
Lots of posting re. Charles Kemp's living in Scotland, etc. but all seemed to be clutching at straws I felt although understandable with just a name to go by.
So, I decided to check if there was a likely Charles Kemp living in Plymouth and came across Charles Kemp b.1877 with wife Fanny. Looked for a marriage but couldn't find one so, knowing that Frances Dorothy said to be born in Glasgow, decided to look for a marriage on Scotlands People and duly found the one in 1914. Since their parents didn't sound at all Scottish and couldn't find any likely births in Scotland turned back to English records and found what I posted earlier.
To me, this Charles and wife Fanny seem the ideal candidates to be the adoptive parents of Frances Dorothy. Both of them living in Devon in 1911, and in 1914 they married in Glasgow (Pollokshields) the area where FD born in 1917. Then, by 1939, all 3 of them are living in Plymouth. Seemed too much of a coincidence to me.
Clearly, Frances Dorothy wasn't born with these names as birth index research on SP has now shown, nor would she have been born as Kemp - indeed, we don't know what Christian name/Surname she would have been registered with only that she was born 2/7/1917. I suspect she was 'adopted' (albeit informally) as a baby and was given new Christian names by Charles Kemp and his wife before they subsequently moved to Devon. Since I've since read that she had no Scottish accent no doubt she was very young when the move from Glasgow to Devon took place and feel sure that Charles and Fanny were the adoptive parents.
Annette