Have just listened for the second time to Hard Boiled Eggs and Nuts, the Afternoon Drama about the early life of Stan Laurel. It will be available on BBC iplayer, here, until next Friday and it's well worth a listen.
Without looking at the various books about Laurel and Hardy I can't say offhand where available facts end and the writer Colin Hough's imagination begins. I daresay there will be others ready to do so, though you will have to seek them out for yourself.
What I can declare, however, is that it's a well crafted play which has precisely the right narrowness of focus to fit that forty five minute slot, and doesn't force in clunky references to Stan's future pairing: there are no later catchphrases casually dropped into the dialogue. True, here are delicate foreshadowings for afficionados in such matters as choice of music, or Stan's complaint to his father that the crude early films he is showing in his theatres don't have stories, but you don't really need to know anything about Laurel and Hardy to enjoy it.