1 9 4 ▁H AA ▁B ty ▁( origin ally ▁part ▁of ▁ 6 0 th ▁( City ▁of ▁London ) ▁H AA ▁R gt ▁which ▁had ▁seen ▁action ▁in ▁the ▁Battle ▁of ▁France ▁and ▁the ▁D unk irk ▁ev acu ation ) ▁and ▁by ▁the ▁anc ill ary ▁units ▁necessary ▁for ▁mobile ▁war fare : ▁ ▁R H Q , ▁ 1 9 4 , ▁ 2 5 0 , ▁ 2 5 2 ▁H AA ▁B t ys ▁▁ 8 0 ▁H AA ▁R gt ▁Sign al ▁Section , ▁Royal ▁Corps ▁of ▁Sign als ▁▁ 8 0 ▁H AA ▁Work shop ▁Section , ▁Royal ▁Elect rical ▁and ▁Mechan ical ▁Engine ers ▁( H Q ▁and ▁ 2 5 2 ▁Section ▁only ) ▁▁ 8 0 ▁H AA ▁R gt ▁Pl ato on , ▁Royal ▁Army ▁Service ▁Corps ▁ ▁Operation ▁Tor ch ▁ ▁The ▁' T orch ' ▁con voy ▁assemble d ▁in ▁the ▁C ly de ▁in ▁October ▁ 1 9 4 2 ▁and ▁set ▁sail ▁through ▁the ▁Stra its ▁of ▁Gib ral tar . ▁ 2 2 ▁AA ▁Brigade ▁was ▁the ▁only ▁AA ▁formation ▁trained ▁in ▁mobile ▁operations ▁and ▁am ph ib ious ▁war fare , ▁and ▁was ▁task ed ▁with ▁landing ▁early ▁in ▁the ▁operation ▁to ▁provide ▁AA ▁cover ▁for ▁the ▁be aches , ▁ports ▁and ▁air fields . ▁The ▁best - tra ined ▁reg iments ▁were ▁selected ▁for ▁the ▁initial ▁assault , ▁with ▁ 8 0 th ▁H AA ▁R gt ▁supp lying ▁one ▁battery ▁( 1 9