It is a brick building and it would have to be scratchbuilt entirely. So I put it at the bottom of my list of things to do and, for the time being, decided to fake it ... Some time, when my skills had improved, I would tackle it. The yard at Yea is also very much a work in progress...
The lining of the tunnel was easily achieved with homemade brick paper, using the same pattern, repeating and then printing it.
After the tunnel was put in place, I built the hills around it, combining them with the photographic back-drop. They are not as authentic as the hills at the rear of Cathkin would later be, but I am quite happy with the general impression of the area.
The fact that the real Cheviot Tunnel is situated some 8.7 km from Yea yard, rather than the scale
300 m it is on the layout, shall forever remain our secret.