I have been using FindMyPast's passenger lists 1890-1960 to follow some of my kin to Morocco. I'm finding that there were marriages in Morocco that produced children there, but I have no record on the ones that did not appear to return to the UK. From what I've found out so far is that the Southern Morocco Mission is where they appeared to work out of. The only link to an embassy is the Vice Consular in Mazagar with the name of an acting V.C. by the name of C.R.B. Pickford, this appears on the birth record of the son of a missionary couple born in Mazagar in 1899. I have not been able to find any minor records or consular returns on SP.