Roman Schmidt says Introduced in May 1961, Neville Hill allocated D346 crosses Chester-le-Street viaduct with the Up Queen of Scots Pullman, as indicated by train reporting number 1E 14 displayed in the loco's headcode panel. The formation consists of a pre-war Pullman Brake and Met-Camm Mk 1 cars built 1960/61. The diesel is in original green livery and the absence of a small yellow warning panel on the front (widely applied from 1962 onwards) and with no leaves on the trees, suggests the picture dates from the winter of 1961