In order for a song to become a 'folk song' it has to be got at by the folk process
some of MacColls songs are taken for tradtional,fiddlers green is another, it does not matter what Ewans thoughts on this were ,this is a fact, they are mistaken for trad songs ,
bring us a barrel is another, Caledonia is another. examples, caledonia, dirty old town, fiddlers green, bring us a barrel, englands motorways, fields of athenry,hard times come again no more,