"Home Guard soldiers operate a 'Blacker Bombard' spigot mortar during training at No. 3 GHQ Home Guard School at Onibury near Craven Arms in Shropshire, 20 May 1943." Home Guard soldiers operate a 'Blacker Bombard' spigot mortar during training at No. 3 GHQ Home Guard School at Onibury near Craven Arms in Shropshire, 20 May 1943.