I find the lack of guns on your Dingo Disturbing... herel et me fix it for you!
And if you want a bit more bang for your Armoured cars:
Jokingly called "The Lord Flashheart" by one of my friends.
Or if you want something a bit more flighty looking:
Both this Humber and the previous Morris Firefly are armed with a 6-pounder gun, with a Molins autoloader taken off a mosquito.