M 1913 Machine guns.
I'm sure there was nothing humorous about what they were doing and those guys took things seriously. After all, they were in harms way facing an enemy who wanted to kill them. Having said that, the thought of a T roaring (actually ticking) across a field with a machine gun blazing makes me smile. They clearly had more guts than I ever did.
Here's another one . . .
Those machine guns in the top picture are Vickers .303 Water Cooled Machine Guns. The second picture shows a Lewis Gun.
Here is a picture of my British Vickers from 1915
Going by the hats, I'd say more Scotts and Brits than Aussies.
A model company has just introduced a 1/35 scale model of the car in the second picture.
Looks like some of the head light lenses are missing. I wouldn't mind having one of those parked in my garage, just for some protection and peace of mind.
The drivers must have been very short, either by necessity or attrition.
Attrition! As a fairly tall person, that sends chills up my spine. I can just hear myself yelling at my trenchmates telling them to dig deeper!
Hmmmmm... Only one brass radiator T - the second from the left.