Armour constructions

A reactive armour construction comprising an outer armour layer rigidly fixed by support means to a structure to be protected so that said outer armour layer is spaced from said structure, an inner armour layer disposed in said space between said outer armour layer and said structure, said inner armour layer being supported on rail means rigidly attached to said structure and being relatively loosely attached to said support means by frangible connectors such that when a projectile penetrates at an oblique angle the outer armour layer and is incident upon the inner armour layer, said connectors are broken whereby said inner armour layer is allowed to move laterally upon said rail means relative to said outer armour layer thereby disrupting a line of attack of the projectile.