(06 Nov 2015, 6:56 pm)Jimmi wrote Thought it was pretty unusual for a 156 to head to Saltburn. Here is photo evidence of 156484 working the 1131 Darlington - Saltburn service today.
Northern Rail: 156484 by Jimmi's Transport Photos, on Flickr

Booked for 5x 142s on the daytime service so very rare.
There are a few early services that are 156s though