DAK if this painting:
http://directart.co.uk/mall/more.php?ProdID=13142
is of an actual station or an imaginary composite?
General opinion after googling seems to be it was a commissioned work and as no suitable location could be found a ficticous location was composed. Apparently the station buildings were styled on those of stations on the GWR Kingsbridge branch in South Devon. This rings a bell with me because Iam sure the Railway Magazine did an article on Don Breckon in the last couple of years or so and this particular painting was featured, hope this helps.