The truck in the first 2 pictures is a Ford WOT2H. The 3rd picture is, I beleive, a Humber radio truck. All the vehicles are from the AFPU unit in North Africa called 'Chet's Circus'. They were famous for faking photographs, and the second photo is a good example. The explosion was actually caused by one of the crew throwing a hand grenade for effect. Chet's Circus was led by Sgt Len Chetwyn, and they re-staged events to get good photographs. There is a classic photograph in the Imperial War Museum, number E18908, which is supposed to show troops advancing in battle. It actually shows Australian troops storming a cookhouse in the rear areas. If you want to read more on 'Chet's Circus', I can recommend 'The Desert War 1940-1942' published by the Imperial War Museum, where a photo of all of Chet's Circus personnel are shown on page 185.