 With a railway now running near the boundary of the Wotton House estate at Quainton Road, the 3rd Duke decided to open a small-scale agricultural railway to connect the estate to the railway. The line was intended purely for the transport of construction materials and agricultural produce, and not passengers. The line was to run roughly southwest from Quainton Road to a new railway station near Wotton Underwood. Just west of the station at Wotton the line split. One section would run west to Wood Siding near Brill. A short stub called Church Siding would run northwest into the village of Wotton Underwood itself, terminating near the parish church, and a 1 mile 57 chain (1 mile 1,254 yards; 2.8 km) siding would run north to a coal siding near Kingswood.
