And it's quality has won praise from railway spokesman George Jones who said: "I thought the mix of recorded interviews ran together very well to give a varied sound picture of a visit to the line and on to Corwen.
"It was well presented by the BBC team and comes over as a serious review of the operation with some lighter touches of humour.
"It was worth all the effort that went into accommodating the BBC team and providing the recorded material.
"Those who didn't hear it can still catch it through the replay which is available on the BBC I-player at: http://www.bbc.co.uk/podcasts/series/cfocus
"It is also due to be repeated on Monday at 5.30am."