2 8 th ▁H AA ▁R gt ▁joined ▁by ▁November ▁ 1 9 4 2 ; ▁left ▁April ▁ 1 9 4 3 ▁▁ 2 8 7 , ▁ 4 0 7 ▁H AA ▁B t ys ▁▁ 3 0 9 ▁H AA ▁B ty ▁attached ▁to ▁ 5 ▁AA ▁B de ▁in ▁ 6 ▁AA ▁Division ▁▁ 4 3 6 ▁H AA ▁B ty ▁attached ▁to ▁ 5 ▁AA ▁Group ▁ 1 4 8 th ▁( M ixed ) ▁H AA ▁R gt ▁joined ▁April ▁ 1 9 4 3 ▁▁ 6 2 4 , ▁ 6 2 8 , ▁ 6 2 9 ▁( M ) ▁H AA ▁B t ys ▁▁ 6 3 1 , ▁ 6 3 3 ▁( M ) ▁H AA ▁B t ys ▁joined ▁October ▁ 1 9 4 3 ▁ 1 5 9 th ▁( M ixed ) ▁H AA ▁R gt ▁new ▁unit ▁formed ▁May ▁ 1 9 4 2 , ▁joined ▁by ▁October ▁ 1 9 4 2 ; ▁left ▁October ▁ 1 9 4 3 ▁▁ 5 4 2 , ▁ 5 4 3 ▁( M ) ▁H AA ▁B t ys ▁ 1 6 9 th ▁( M ixed ) ▁H AA ▁R gt ▁joined ▁October ▁ 1 9 4 3 ▁▁ 5 6 6 , ▁ 5 7 1 , ▁ 5 7 6 , ▁ 5 7 8 ▁( M ) ▁H AA ▁B t ys ▁ 4 th ▁( U l ster ) ▁Light ▁Anti - A ircraft