A Z Battery was a short range anti-aircraft weapon system, launching 3 in (76 mm) diameter rockets from ground-based single and multiple launchers, for the air defence of Great Britain in the Second World War.
[2] In October 1940, an experimental Z Battery became operational at Cardiff in South Wales under the command of Major Duncan Sandys, Churchill's son-in-law.
[a] Trials against a radio-controlled Queen Bee target aircraft were successful, although the Director of Artillery at the Ministry of Supply suspected that the results were "fixed".
[6] The other Dornier 17 was shot down by Corporal John Miller of the Scots Guards, using a Lewis gun; both men were awarded the Military Medal.
[7] From early 1942, the manning of Z Batteries began to be transferred to the Home Guard, as the equipment was comparatively simple to operate and the rounds were lighter.