I searched the forums bit and didn't see this question come up.
I just learned that my great grand dad was a ham in England and first licensed in the 1930's. Is there a way to research what his call sign might have been? He was apparently quite active in the hobby until he passed but nobody apparently has any more info. Since I'm a newbie ham, I am finding this tidbit of family history very cool. I guess it's just in the blood.
His call sign would have been somewhere in this sequence:
As far as I know there were no licences issued during WW2, and post war it was 1946 starting with G3AAA. I hope this helps narrow your search somewhat.