
Originally Posted by
norwichpaul
Welcome to AiX Carol. That is a difficult one to give a definitive answer straight away. You have to first understand a little about the command structure. At the start of war, Anti-Aircraft Command was divided into seven AA divisions (1 to 7), it was then re-organised in the spring of 1941 into 12 divisions under three Corps, but all this changed at the end of 1942 when divisions and corps were replaced by six AA groups. At the lower end of the hierarchy there were three main tiers of command which actually stayed constant throughout the war. Below a division, was a brigade, below that were regiments and then regiments were sub-divided into batteries which were made up of platoons which manned the guns. The 1st AA Division as far as I can tell were responsible for the defence of London. The Z may refer to ZAA, a 3 in or 2 in rocket projector, the launchers have up to 20 barrels - the small versions used against low flying aircraft and the 3 in against high flying aircraft.
You can see thae nature of the problem, as the info you have appears to be the higher formations, and it would be good to know more about regiment level - I hope that make some sense. I did a quick search at the national archives and I cannot find anything using the key words that you supplied (but that does not mean they dont have anything that would be of help - it simply means their search engine is not very good).
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