Max Hedges found this pic on the
AWM database
Caption:
WESTERN DESERT, EGYPT. 1942-07-18. TWO CARRIERS, (TRACKED, STARTING AND CHARGING), BEING CARRIED TO A FORWARD AREA ON A TRUCK. THE PURPOSE OF THESE CARRIERS IS TO START TANK ENGINES AND CHARGE BATTERIES. THE DRAG-LINE EXCAVATOR IN THE BACKGROUND IS ON THE CONSTRUCTION OF A TANK TRAP ASTRIDE THE COAST ROAD, ABOUT 20 MILES WEST OF ALEXANDRIA.
So there's no excuse now for those with two carriers not to attend...