& SL R ' s ▁E ust on ▁station ▁and ▁the ▁C CE & HR ' s ▁station ▁at ▁Cam den ▁Town , ▁had ▁originally ▁been ▁planned ▁in ▁ 1 9 1 2 ▁but ▁had ▁been ▁delayed ▁by ▁World ▁War ▁I . ▁The ▁second ▁connection ▁linked ▁the ▁C CE & HR ' s ▁Em bank ment ▁and ▁C & SL R ' s ▁Ken ning ton ▁stations ▁and ▁provided ▁a ▁new ▁intermediate ▁station ▁at ▁Water lo o ▁to ▁connect ▁to ▁the ▁main ▁line ▁station ▁there ▁and ▁the ▁Baker lo o ▁line . ▁The ▁smaller - d iam eter ▁t unn els ▁of ▁the ▁C & SL R ▁were ▁expanded ▁to ▁match ▁the ▁standard ▁diameter ▁of ▁the ▁C CE & HR ▁and ▁the ▁other ▁deep ▁t ube ▁lines . ▁ ▁Ext ensions ▁In ▁conj unction ▁with ▁the ▁works ▁to ▁integrate ▁the ▁two ▁lines , ▁two ▁major ▁extensions ▁were ▁undert aken : ▁north wards ▁to ▁Ed g ware ▁in ▁M idd les ex ▁( now ▁in ▁the ▁London ▁Bor ough ▁of ▁Bar net ) ▁and ▁south wards ▁to ▁M orden ▁in ▁Sur rey ▁( then ▁in ▁the ▁M erton ▁and ▁M orden ▁Urban ▁District , ▁but ▁now ▁in ▁the ▁London ▁Bor ough ▁of ▁M erton ). ▁ ▁Ed g ware ▁Ext ension ▁The ▁Ed g ware ▁extension ▁used ▁plans ▁d ating ▁back ▁to ▁ 1 9 0 1 ▁for ▁the ▁Ed g ware ▁and ▁H amp st ead ▁Railway ▁( E & HR ) ▁which ▁the ▁U ER L ▁had ▁taken ▁over ▁in ▁ 1