There's a forgotten Radio Ballad actually a TV Ballad / Film (!!) featuring Ewan MacColl - also at the BFI. Details here:

Darlington

http://player.bfi.org.uk/film/watch-darlington-railway-1960/

http://www.northeastfilmarchive.com/videos/10863/way-we-live-darlington-railway

http://www.northeastfilmarchive.com/videos/10863/way-we-live-darlington-railway

BTW to play BFI films from overseas you might need to set up a UK-connected VPN - say Hola or ExpatShield or something.

CJB