▁( Lond on ) ▁Company ▁Air ▁Form ation ▁Sign als ▁( SR ), ▁and ▁had ▁A ▁Company ▁ 1 st ▁West ▁London ▁Cad et ▁Corps ▁affili ated ▁to ▁it . ▁ ▁World ▁War ▁II ▁ ▁M obil isation ▁When ▁the ▁T A ▁was ▁double d ▁in ▁size ▁in ▁early ▁ 1 9 3 9 ▁after ▁the ▁Mun ich ▁Cris is , ▁the ▁unit ▁split ▁to ▁form ▁ 1 st ▁and ▁ 2 nd ▁( Lond on ) ▁Corps ▁Sign als . ▁However , ▁on ▁the ▁out break ▁of ▁war ▁these ▁were ▁red es ign ated , ▁the ▁ 1 st ▁Line ▁unit ▁joining ▁L t - Gen ▁Alan ▁Bro oke ' s ▁II ▁Corps ▁with ▁the ▁British ▁Ex ped ition ary ▁Force ▁( BE F ) ▁as ▁ 2 nd ▁( Lond on ) ▁Corps ▁Sign als , ▁while ▁the ▁ 2 nd ▁Line ▁unit ▁was ▁ear mark ed ▁for ▁IV ▁Corps ▁in ▁ 1 9 4 0 ▁but ▁became ▁ 5 th ▁( Lond on ) ▁Corps ▁Sign als . ▁ ▁Organisation ▁In ▁ 1 9 3 9 , ▁the ▁organisation ▁of ▁a ▁corps ▁signal ▁unit ▁was ▁as ▁follows : ▁ ▁H Q ▁▁ 1 ▁Company ▁- ▁for ▁construction ▁▁ 4 ▁line - lay ing ▁sections ▁▁ 1 ▁line ▁maintenance ▁section ▁▁ 2 ▁Company ▁– ▁operating ▁▁ 3 ▁operating ▁sections ▁▁ 3 ▁wireless ▁sections ▁▁ 2 ▁mess enger ▁sections ▁( each ▁of ▁ 1 ▁Serge ant ▁and ▁ 2 4 ▁des patch ▁rid ers ) ▁▁ 3 ▁Company ▁– ▁corps ▁art illery