▁ 3 / 4 th ▁B n ' s ▁b illet s ▁at ▁Bar net ▁in ▁July ▁ 1 9 1 5 , ▁with ▁training ▁carried ▁out ▁at ▁Tr ent ▁Park . ▁When ▁the ▁Derby ▁scheme ▁su pers eded ▁volunt ary ▁en list ment ▁in ▁February ▁ 1 9 1 6 , ▁a ▁large ▁number ▁of ▁rec ruits ▁were ▁assigned ▁directly ▁to ▁bring ▁ 3 / 4 th ▁B n ▁up ▁to ▁strength , ▁but ▁were ▁put ▁through ▁the ▁ 4 / 4 th ▁B n ' s ▁training ▁process . ▁ ▁In ▁January ▁ 1 9 1 6 ▁the ▁reserve ▁batt al ions ▁for ▁the ▁whole ▁ 1 st ▁London ▁Division ▁were ▁concentr ated ▁on ▁Sal is bury ▁P lain , ▁the ▁ 4 th ▁going ▁to ▁No ▁ 7 ▁Camp , ▁Hur dc ott . ▁In ▁February ▁the ▁batt alion ▁received ▁a ▁draft ▁of ▁four ▁officers ▁and ▁ 5 0 ▁men ▁from ▁Tr in idad ▁for ▁basic ▁training ; ▁this ▁party ▁later ▁served ▁with ▁ 3 / 4 th ▁B n ▁Dev ons hire ▁Regiment ▁in ▁India . ▁On ▁ 8 ▁April ▁the ▁unit ' s ▁title ▁was ▁changed ▁to ▁ 4 th ▁( Res erve ) ▁B n , ▁London ▁Regiment , ▁forming ▁part ▁of ▁the ▁ 1 st ▁London ▁Reserve ▁Group . ▁On ▁ 1 ▁September ▁ 1 9 1 6 ▁the ▁ 4 th ▁Reserve ▁B n ▁was ▁absor bed ▁by ▁the ▁ 3 rd ▁Reserve ▁B n , ▁London ▁R gt . ▁Colonel ▁V ick ers ▁Dun