▁at ▁T ad worth ▁as ▁the ▁ 3 / 1 st ▁London ▁Brigade . ▁ ▁In ▁June ▁ 1 9 1 5 ▁a ▁re organisation ▁saw ▁the ▁men ▁of ▁the ▁ 3 / 1 st ▁London ▁Brigade ▁who ▁were ▁un fit ▁for ▁over se as ▁service ▁separated ▁out ▁into ▁a ▁composite ▁batt alion , ▁the ▁ 1 0 0 th ▁Pro vis ional ▁Battalion , ▁to ▁which ▁the ▁ 3 / 4 th ▁Lond ons ▁supplied ▁two ▁officers ▁and ▁about ▁ 1 0 0 ▁other ▁ranks . ▁The ▁new ▁batt alion ▁was ▁station ed ▁at ▁Al de burgh , ▁guard ing ▁the ▁East ▁Coast ▁as ▁part ▁of ▁ 6 th ▁Pro vis ional ▁Brigade . ▁In ▁August , ▁all ▁the ▁men ▁of ▁the ▁Pro vis ional ▁Battalion ▁were ▁returned ▁to ▁their ▁units ▁except ▁those ▁who ▁had ▁not ▁volunte ered ▁for ▁over se as ▁service . ▁The ▁Home ▁Service ▁men ▁continued ▁serving ▁in ▁home ▁defence ▁until ▁ 1 9 1 6 , ▁when ▁the ▁Military ▁Service ▁Act ▁swe pt ▁away ▁the ▁Home / Over se as ▁service ▁distinction ▁and ▁the ▁prov is ional ▁batt al ions ▁took ▁on ▁ ▁the ▁dual ▁role ▁of ▁home ▁defence ▁and ▁physical ▁condition ing ▁to ▁render ▁men ▁fit ▁for ▁draft ing ▁over se as . ▁The ▁ 1 0 0 th ▁Pro vis ional ▁Battalion ▁officially ▁became ▁the ▁ 2 9 th ▁( City ▁of ▁London ) ▁B n , ▁London ▁Regiment ▁( TF ) ▁on ▁ 1 ▁January ▁ 1 9 1 7 . ▁The ▁batt alion ▁never