Train to Loftus from Whitby

We wondered where this train was and the probable journey, having been told by Derick Pearson that it is the 67750 (locomotive number) and was on the Whitby to Loftus line. Tom Sayers has come to the rescue with the following information: ”This picture was taken just after the train had come out of the tunnel at Easington on the way to Loftus.”
Image courtesy of Maurice Grayson (from the Neville Stead Collection), with thanks to Derick and Tom for the updates.