55022 'Royal Scots Grey' stands at Hull station waiting to leave with the 16.30 to King's Cross. Notice in this photograph the larger square around the footstep above the buffer beam. This was a unique identifier to 55022 and marked the spot where it once had an experimental flashing light fitted. Also notice the oil lamp sitting on the platform ramp at the base of the colour light that appears to be lit given the red light reflected.
There is an audio recording of this event on my Youtube channel, see.....
https://youtu.be/KeTVheQqth8