Hello Cliff & Vegimite,
Like you too, I was not entirely sure that these trucks could be labelled definitely as LRDG as there were masses of ex military trucks left in the Middle East after the conflict, and many of these must have ended up in civilian use just as they have in places like Burma until very recently.
Another travel website run by Fliegel Jezericky Expeditions has two absolutely fascinating articles with photograpghs of supply chain lorries which were running from Wadi Haifa to Kufra and beyond in support not so much of the LRDG but of the Free French.
This site also has photos by Bimbashi (capt.) Arkwright who was Commanding Officer of the No.1. Motor Machine Gun Battery of the SDF, occupying Bir Murr at Uweinat in 1934. Some photos show Almásy, as well as the ascent of Uweinat.
http://www.fjexpeditions.com/
Enjoy.
Regards
Nick Balmer