▁Anti - A ircraft ▁Company ▁at ▁Green hit he ▁▁ 3 4 7 th ▁( K ent ) ▁Anti - A ircraft ▁Company ▁at ▁Sid cup ▁ 3 2 nd ▁( 7 th ▁City ▁of ▁London ) ▁Anti - A ircraft ▁Battalion , ▁RE ▁( TA ). ▁A ▁search light ▁unit ▁formed ▁in ▁ 1 9 3 5 ▁by ▁conversion ▁of ▁ 7 th ▁London ▁Regiment ▁( Post ▁Office ▁R if les ) ▁affili ated ▁to ▁the ▁M idd les ex ▁Regiment ▁ ▁H Q ▁at ▁F ins bury ▁Square ▁▁ 3 2 8 th ▁Anti - A ircraft ▁Company ▁at ▁F ins bury ▁Square ▁▁ 3 2 9 th ▁Anti - A ircraft ▁Company ▁at ▁Gro ve ▁Park , ▁Lew ish am ▁▁ 3 3 0 th ▁Anti - A ircraft ▁Company ▁at ▁Gro ve ▁Park ▁▁ 3 3 1 st ▁Anti - A ircraft ▁Company ▁at ▁B ex ley he ath ▁ ▁The ▁ 2 8 th ▁and ▁other ▁anti - air craft ▁groups ▁adopted ▁the ▁more ▁normal ▁formation ▁title ▁of ▁' B rig ades ' ▁after ▁the ▁Royal ▁Art illery ▁red es ign ated ▁its ▁Brig ades ▁as ▁" Reg iments " ▁in ▁ 1 9 3 8 . ▁ ▁M obil isation ▁ ▁Order ▁of ▁Battle ▁ 1 9 3 9 ▁By ▁the ▁out break ▁of ▁World ▁War ▁II ▁on ▁ 3 ▁September ▁ 1 9 3 9 ▁the ▁London ▁and ▁search light ▁units ▁had ▁left ▁ 2 8 th ▁AA ▁B de , ▁which ▁was ▁now ▁entirely ▁composed