▁take ▁up ▁positions ▁around ▁D unk irk ▁beach ▁to ▁protect ▁the ▁ev acu ation ▁of ▁the ▁BE F , ▁inten se ▁enemy ▁air ▁activity . ▁ 1 9 4 th ▁B atter y ▁in ▁action ▁at ▁U x em , ▁heavy ▁p alls ▁of ▁smoke ▁over ▁the ▁whole ▁area ▁made ▁observation ▁difficult . ▁Gun ner ▁Walker ▁killed ▁in ▁attack ▁on ▁No ▁ 1 ▁gun .' ▁( W ar ▁Di ary ▁ 6 0 th ▁H AA ▁R gt ). ▁▁ 2 nd ▁AA ▁Brigade ▁took ▁over ▁the ▁AA ▁defence ▁of ▁the ▁D unk irk ▁area ▁during ▁the ▁ev acu ation , ▁deploy ing ▁ 6 0 th ▁H AA ▁R gt ▁at ▁Berg ues ▁in ▁the ▁southern ▁sector ▁with ▁additional ▁responsibility ▁for ▁anti - t ank ▁defence ▁of ▁the ▁D unk irk - B erg ues ▁Canal . ▁As ▁the ▁' po cket ' ▁sh rank , ▁the ▁AA ▁units ▁destroyed ▁their ▁guns ▁and ▁joined ▁the ▁que ues ▁waiting ▁to ▁emb ark ▁in ▁the ▁small ▁ships ▁of ▁Operation ▁Dynam o . ▁ ▁The ▁Bl itz ▁AA ▁units ▁returning ▁from ▁France ▁were ▁rapidly ▁rein for ced , ▁re - equ ipped ▁where ▁possible , ▁and ▁re deploy ed ▁for ▁future ▁integration ▁into ▁existing ▁defence ▁plans . ▁ 6 0 th ▁H AA ▁Regiment ▁went ▁to ▁Aber yst w yth ▁where ▁it ▁re - equ ipped ▁with ▁ 3 - inch ▁guns . ▁In ▁the ▁summer ▁of ▁ 1 9 4 0 , ▁along ▁with ▁other ▁AA ▁units ▁equ ipped ▁with ▁ 3 - inch