This is a lledo Walkers crisps van I found on Ebay, with a few modifications. The loud speakers I bought of my son (I know!). There out of his Lego box.
In our game it will count as a lightly armoured vehicle, with out weapons or troop carrying capacity (the back is full of pamphlets and other equipment). it will have a detrimental effect on the enemies morale and communication (it's sort of an anti-standard bearer).