The Bedford OYD Armadillo was a Bedford OY fitted for airfield defence with Lewis guns and an ex-aircraft COW 37 mm gun.
This vehicle was used by the RAF for airfield defence and later the Home Guard.
After finding the side plates, the next stage will be a white undercoat.
As with many of my 15mm metal vehicles I don’t recall who the manufacturer was.
Have since found out this model was manufactured by SDD Models.