With the Yorkshire Pullman - estimated date not yet with its BR number and with BRITISH RAILWAYS in full on the tender.
John Clayson helps with the location "This is an Up train at Great Ponton cutting, south of Great Ponton station and approaching Highdyke. The signal is Highdyke's Up Goods Distant, with signal wires in the left foreground for it and presumably the Up Main Distant; the milepost at extreme left is (101)¾".