37602 heads along the down relief line at Denchworth on 17 August 2009 with the 1Z12 08:57 Derby to Bristol Temple Meads (via Oxford and Newport) Network Rail radio survey test train. 37218 is on the rear of the train, partly hidden by the signal gantry. Running twenty minutes early at this point, it was presumably going to combine the two short layovers in the loops at Steventon and Challow into one long wait at Challow!