This is from Wiki. Of course macColl's scottish accent was based on deep immersion in scottish culture....not faked.

MacColl was born as James Henry Miller in Broughton, Salford, Lancashire to Scottish parents, William Miller and Betsy Miller née Hendry. Both of his parents were socialists and William Miller was an iron-moulder and militant trade unionist who had moved to Salford with his wife to look for work after being blacklisted in almost every foundry in Scotland.[1] They lived amongst a group of émigré Scots and Jimmy, their only surviving child of four, was brought up in an atmosphere of fierce political debate interspersed with the large repertoire of songs and stories his parents had brought from Scotland.[1]