▁the ▁Battle ▁of ▁Britain . ▁By ▁now , ▁the ▁regiment ▁had ▁been ▁transferred ▁to ▁ 3 5 ▁AA ▁B de ▁def ending ▁Port sm outh . ▁In ▁July , ▁the ▁regiment ▁was ▁joined ▁by ▁R H Q ▁and ▁ 1 2 ▁H AA ▁B ty ▁of ▁ 6 th ▁H AA ▁R gt , ▁which ▁had ▁got ▁away ▁from ▁D unk irk ▁without ▁its ▁guns ▁and ▁equipment . ▁ 1 2 ▁H AA ▁B ty ▁was ▁split ▁into ▁four ▁sections , ▁with ▁B atter y ▁H Q , ▁A ▁and ▁C ▁Se ctions ▁under ▁ 2 5 2 ▁H AA ▁B ty ▁at ▁Brown wich , ▁F are ham , ▁B ▁Section ▁at ▁Fort ▁South wick ▁and ▁D ▁Section ▁at ▁Fort ▁Nelson , ▁both ▁under ▁ 2 5 0 ▁H AA ▁B ty . ▁The ▁D unk irk ▁veter ans ▁who ▁had ▁lost ▁their ▁old ▁ 3 - inch ▁guns ▁had ▁the ▁opportunity ▁to ▁become ▁familiar ▁with ▁the ▁modern ▁ 3 . 7 - inch ▁guns ▁operated ▁by ▁ 8 0 th ▁H AA ▁R gt , ▁even ▁though ▁these ▁had ▁already ▁been ▁through ▁the ▁hands ▁of ▁several ▁units ▁and ▁their ▁gun ▁stores ▁were ▁incomplete . ▁ ▁Short ly ▁after ▁this , ▁R H Q ▁of ▁ 6 ▁H AA ▁R gt ▁was ▁sent , ▁with ▁ 2 5 0 / 8 0 ▁H AA ▁B ty ▁under ▁command , ▁to ▁Kent ▁in ▁a ▁scheme ▁c oden amed ▁' B ov ril ' ▁to ▁defend ▁roads ▁leading ▁away ▁from ▁the ▁South ▁Coast ▁in