Ed, thanks for pointing out the AoS having red numbers - wonder the reason and if that itself dates the photo?
It does seem Commonwealth use of the White Scout Car introduced a number of changes or deletions, particularly for use in NWE. Found someone's compiled list here, plus some photos - particularly useful are the top view showing the MG rails removed:
http://hmvf.co.uk/topic/40344-white-...-use-nwe-1944/
Also another example of the triple set of hinges on the rear:
regards,
Jack