The date quoted on the neg may be incorrect:
From brdatabase - "New BR Standard Class 5 4-6-0s 73053/54 (20A) joined 73045 at the end of June on the Holbeck working to York and Scarborough. During the Bank Holiday period Horwich Moguls 42795/98 (20A) were also used on this turn, but it was worked on Saturday 7/8/54 by Jubilee 45605 (20A)"