Military installation

Early method of detecting approaching aircraft, superseded by radar in the 1930s.

Building in which volunteer soldiers can practise military drills.

Former drill hall in Skipton, North Yorkshire, now converted into office accommodation.

Former cavalry barracks in Hulme, Manchester, now converted into flats.

Large-scale night-time decoy created during the blitz of the Second World War to simulate burning British cities, diverting German night bombers from their intended targets.