The locomotive is a 1400 Class, or better known as a 14xx - G.W.R. Collett - 0-4-2 Auto Train Loco.    These engines were originally built as 4800 Class tanks, introduced in 1932, and later re-classified as 1400 Class.    The tank engine featured here is No, 1450, which was attached to the Wallingford Branch in the late 30's. 

The carriage modelled here - No,194, was also attached to the Wallingford Branch around that time, and was built at the Swindon works around 1930.   It is identified as a Diagram A30, Lot 1480.  The model has full interior seat detail, with the fabric pattern simulating very close to the pattern used on that trailer car.  The interior walls are covered with actual painted wood planks as was the original.   The interior lights work, as does the rear red lamp mounted below the centre window.