 The work was completed by 28 January 1940 and the line south of Winslow Road became effectively a long siding.Train crews operated the level crossing gates and all signalling was removed to make the route one section between two junctions.Freight traffic from the Oxford to Bletchley line was rerouted via a connecting spur near which was brought into use on 14 September 1940, thereby allowing trains to work south over the Great Central Main Line.