▁Br istol ▁was ▁a ▁major ▁target . ▁The ▁city ▁was ▁bom bed ▁heavily ▁on ▁ 2 4 / 2 5 ▁November , ▁ 2 / 3 ▁and ▁ 6 / 7 ▁December , ▁and ▁ 3 / 4 ▁January ▁ 1 9 4 1 , ▁while ▁Av on mouth ▁was ▁hit ▁on ▁ 4 / 5 ▁and ▁ 1 6 / 1 7 ▁January . ▁After ▁a ▁l ull ▁in ▁February , ▁Br istol ▁and ▁Av on mouth ▁were ▁hit ▁again ▁on ▁ 1 6 / 1 7 ▁March , ▁ 3 / 4 , ▁ 4 / 5 ▁and ▁ 1 1 / 1 2 ▁April ▁( the ▁Br istol ▁Bl itz ). ▁Other ▁ra ids ▁passed ▁over ▁the ▁Br istol ▁area ▁on ▁their ▁way ▁to ▁targets ▁in ▁Northern ▁England . ▁By ▁now , ▁the ▁success ▁rates ▁for ▁the ▁AA ▁guns ▁and ▁night ▁f igh ters ▁gu ided ▁by ▁rad ar ▁and ▁S / L s ▁were ▁rising ▁stead ily ▁and ▁Luft wa ffe ▁cas ual ties ▁increased . ▁ ▁Mid - W ar ▁ ▁The ▁Bl itz ▁ended ▁in ▁May ▁ 1 9 4 1 , ▁but ▁AA ▁Command ▁continued ▁to ▁increase ▁its ▁capabilities . ▁A ▁new ▁ 5 5 9 ▁S / L ▁B ty ▁formed ▁on ▁ 1 3 ▁February ▁ 1 9 4 1 ▁at ▁ 2 3 6 th ▁S / L ▁Training ▁R gt , ▁O sw est ry , ▁from ▁a ▁cadre ▁supplied ▁by ▁ 7 4 th ▁( Es sex ▁Fort ress ) ▁S