https://heritage.canadiana.ca/view/oocihm.lac_reel_c8283/1822?r=0&s=4 This report resulted “from a survey made by Major J.D. Relyee, while attached to British First Army in North Africa, during May, June and July” 1943. It is a comprehensive report running to 136 pages, plus scores of illustrations, and well worth a read if you have an interest in the functioning of REME.