Off-forum discussions have highlighted the fact that there seems to be no surviving record of the AoS markings allocated at Army level during 1939 /40. It is to be hoped that Drew will find a listing similar to that which he turned up for 1 Corps 1 Corps Formation Signs and AoS Markings but in the meantime, it seemed like a reasonable idea to post some images of vehicles and see if any patterns or clues emerge. Many markings are identifiable as 'Army Troops' by virtue of the white bar underneath but there are others, with high serials which don't appear to carry this and neither do they fit into the known schemes for lower units. The later 'Army Troops' marking was used by units directly controlled by BEF GHQ according to Hodges & Taylor. No.1 seems a good place to start. This Ford saloon on the beach carrying the '1' with a bar under appears to be on a black background and following the known practice at division and corps level must almost certainly be HQ BEF. Did HQ BEF have a command formation sign ? Howard Cole makes no mention and unfortunately in this image, the strategically placed jack-boot obscures where any would be located. Thanks to Andrew (May 1940)'s new publication, we can now categorically identify many of the Arm of Service markings. The '1' on this Ford, on a black ground with bar under indicates GHQ 1st Echelon, "All Spare Vehicles"