Peter.
The airframe exhibited at Hendon is a composite of the fuselage from Avro 504K G-EBJE (originally registered as such), and the wings from Avro 548A G-EBKN(originally registered as E449).
The RAF Museum has understandably chosen a military registration to display the aircraft, namely E449.
As we have no images of any of the original three registrations, I can see no reason to have more than one profile, and in order to to avoid confusing those who have seen and photographed the museum image, I would prefer to have the airframe as a single profile, E449, and append to it an explanatory note about the background.
Incidentally, we seem to have "lost" the profile for D7560 but I see that the three images are in the "Aircraft photos without a profile" list and I will re-instate it.
Malcolm.