(13 Oct 2015, 6:02 pm)passenger_10 wrote This morning 7470 was on the X15 which leaves Berwick at 7:32. When it got to Alnwick it pulled in to the X18/X20 stand, changed number to the X20, and quickly went off again. I saw it later in the day in Ashington on an X20, so I assume it did do the X20 run.
The 0620 X15 from Alnwick to Berwick and the 0727 from Berwick Station to Alnwick works onto the X20.