▁case ▁of ▁invasion , ▁and ▁at ▁the ▁same ▁time ▁to ▁recon no it re ▁and ▁prepare ▁AA ▁gun ▁sites ▁for ▁when ▁guns ▁became ▁available . ▁This ▁was ▁done ▁at ▁Ash ford , ▁Can ter bury , ▁E den bridge , ▁Seven o aks , ▁T enter den ▁and ▁Tun bridge ▁Well s . ▁By ▁the ▁end ▁of ▁August , ▁ 6 ▁H AA ▁R gt ▁was ▁command ing ▁a ▁group ▁of ▁batter ies , ▁including ▁its ▁own ▁ 1 2 ▁H AA ▁B ty ▁and ▁ 2 5 1 / 8 0 ▁H AA ▁B ty , ▁as ▁a ▁mobile ▁force ▁in ▁Kent ▁( for ▁which ▁ 1 2 / 6 ▁B ty ▁had ▁to ▁borrow ▁vehicles ▁from ▁ 2 5 1 / 8 0 ). ▁ ▁The ▁Battle ▁of ▁Britain ▁was ▁now ▁under ▁way , ▁and ▁during ▁late ▁July ▁and ▁throughout ▁August ▁the ▁batter ies ▁had ▁fle eting ▁engag ements ▁with ▁small ▁numbers ▁of ▁ra iders ▁along ▁the ▁South ▁Coast . ▁There ▁were ▁attacks ▁on ▁South am pton ▁and ▁Port sm outh ▁– ▁a ▁particularly ▁bad ▁ra id ▁on ▁Port sm outh ▁on ▁ 2 4 ▁August ▁– ▁ ▁and ▁on ▁Lee - on - Sol ent ▁and ▁G os port ▁air fields . ▁During ▁early ▁September ▁the ▁pattern ▁of ▁fle eting ▁targets ▁– ▁but ▁no ▁' k ills ' ▁– ▁for ▁all ▁the ▁batter ies ▁continued ▁by ▁day ▁and ▁night . ▁Most ▁of ▁the ▁ 3 - inch ▁guns ▁in ▁the ▁battle ▁area ▁had ▁been ▁replaced ▁by ▁ 3 . 7