▁the ▁extreme ▁right . ▁At ▁a ▁late ▁stage ▁ 1 / 4 th ▁Lond ons ▁were ▁attached ▁to ▁the ▁weak ▁ 5 3 rd ▁B de ▁for ▁this ▁operation , ▁but ▁the ▁CO , ▁L t - Col ▁H . ▁Campbell , ▁was ▁wounded ▁on ▁the ▁way ▁to ▁meet ▁the ▁brig ad ier , ▁and ▁his ▁second - in - command ▁had ▁less ▁than ▁ 2 4 ▁hours ▁to ▁recon no it re ▁and ▁prepare ▁the ▁attack , ▁in ▁mud dy ▁terrain , ▁with ▁the ▁start ▁line ▁changed ▁at ▁the ▁last ▁moment . ▁The ▁batt alion ▁left ▁its ▁mud ▁holes ▁and ▁followed ▁the ▁bar rage ▁at ▁ 0 5 . 4 5 ▁on ▁ 1 6 ▁August , ▁but ▁ 7 th ▁B n ▁Bed ford shire ▁Regiment ▁was ▁unable ▁to ▁take ▁a ▁concrete ▁pill box , ▁which ▁caused ▁many ▁cas ual ties ▁to ▁the ▁ 1 / 4 th ▁Lond ons , ▁who ▁were ▁brought ▁to ▁a ▁stand st ill ▁and ▁could ▁do ▁no ▁more ▁than ▁form ▁a ▁def ensive ▁fl ank ▁along ▁the ▁edge ▁of ▁Glen cor se ▁Wood . ▁Tw elve ▁officers ▁and ▁ 1 8 2 ▁other ▁ranks ▁had ▁been ▁killed ▁or ▁wounded . ▁The ▁division ▁was ▁pulled ▁out ▁of ▁the ▁line ▁the ▁following ▁day ▁for ▁re organisation . ▁ ▁Camb rai ▁The ▁cas ual ties ▁from ▁the ▁Y pres ▁fighting ▁were ▁not ▁replaced , ▁and ▁the ▁whole ▁division ▁was ▁numer ically ▁weak , ▁companies ▁in ▁ 1 / 4 th ▁Lond ons ▁being ▁reduced ▁to ▁just ▁two ▁effective