Good thinking Nick
However I find it a bit hard to comprehend.
I have never seen/heard of any Bristol aircraft being painted with its construction number.
Seller at least strongly indicates the photos were taken at Narborough and/or Netheravon (in our particular case).
Both airfields were large ones with plenty of units coming and going during the war.
There is nothing so far which support that 7028 ever went with any unit to any of these fields. As far as the preserved records go it seems it was assigned to the Middle East and in the end 67 Sq.
On the other hand if we look at 7054 it served with No 43 Sq and arrived to Netheravon on 13 Nov 1916
43 Sq was one of the units at Netheravon at the time.
So my money is still on 7054...
Cheers
Stig