Interview with Jonathan Teplitzky on telling this true story
The director talks about honoring the story of WWII POW Eric Lomax and having him on the set of the Colin Firth drama, as well as the challenge of keeping the performances of the two actors playing Lomax consistent, filming on the real Thai-Burma Railway and how his own personal grief played into the film:
http://moveablefest.com/moveable_fest/2014/04/jonathan-teplitzky-railw ay-man.html