AtrumVorago,
I did a Google search for "E H Spencer, York, The Gateway to History." Found one that sold 08 June 2013 at Sheffield Railwayana Auction for about 200 dollar U S. The same image is in The National Railway Museum. Painting was done in 1955. It's not much help but maybe this will start you on your quest. Very nice "Sally Boutique" save. Hope this helps, Terry.