Scenes filmed around the tunnel at Wansford for 'Casualty' a few months ago were included in the episode broadcast on BBC1, Saturday 18th June.
Here is the iPlayer link: http://www.bbc.co.uk/i/b0122tb9/
Some NVR footage is during the first five minutes, the main part starts after the 28min 30 sec mark. It has to be said that the locomotive continuity is questionable!
