Re question above as to Ewan's 'day job': following extracts from his Wikipedia entry might give some guidance --
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In 1946 members of Theatre Union and others formed Theatre Workshop and spent the next few years touring, mostly in the north of England. In 1945, Miller changed his name to Ewan MacColl (influenced by the Lallans movement in Scotland. In Theatre Union roles had been shared, but now, in Theatre Workshop, they were more formalised. Littlewood was the sole producer and MacColl the dramaturge, art director, and resident dramatist...
Many of MacColl's best-known songs were written for the theatre. For example, he wrote "The First Time Ever I Saw Your Face" very quickly at the request of Peggy Seeger, who needed it for use in a play she was appearing in...
MacColl had been a radio actor since 1933. By the late 1930s he was writing scripts as well. In 1957 producer Charles Parker asked MacColl to collaborate in the creation of a feature programme about the heroic death of train driver John Axon....