A protective vehicle body of non-metallic material comprises an integrally molded base (1) providing a floor and a lower body wall (5), the lower body wall having a lip (6) extending outwardly therefrom; and an upper part (2) providing a roof and an upper body wall, a lower edge of the upper body wall fitting within the lip (6) and being demountably attached to the base (1). The body forms part of a vehicle additionally having a front portion (8) including a front axle and a rear portion (9) including a rear axle, the front and rear portions (8, 9) being attached to the vehicle body by attachment means that are severable from the vehicle body by a blast wave.