It's a 28mm steam pram for Eureka's anarchist nannies!
The image had crossed my mind, but, full stop, wait 'anarchist nannies' actually exist?
They exist!

I do think it'd be a common joke, right up until having to face that Maxim.
Doesn't look like a patrol vehicle; more a 'mad dash' cavalry-style unit.
Need we say, keep 'em coming?
Doug