Armadillo (armoured truck)
The Armadillo was an extemporized improvised armoured truck produced in Britain during the invasion crisis of 1940–1941. Based on a number of standard lorry (truck) chassis, it comprised a wooden fighting compartment protected by a layer of gravel and a driver's cab protected by mild steel plates.
Source: Wikipedia — Armadillo (armoured truck) (CC BY-SA 4.0)