gate , ▁with ▁branches ▁to ▁Alex andra ▁Palace ▁and ▁High ▁Bar net . ▁The ▁line ▁taken ▁over ▁would ▁be ▁extended ▁beyond ▁Ed g ware ▁to ▁Bro ck ley ▁Hill , ▁El st ree ▁South ▁and ▁Bus he y ▁He ath ▁with ▁a ▁new ▁dep ot ▁at ▁Ald en ham . ▁The ▁extension ' s ▁route ▁was ▁that ▁planned ▁for ▁the ▁un built ▁Wat ford ▁and ▁Ed g ware ▁Railway ▁( W & ER ), ▁using ▁rights ▁obtained ▁from ▁the ▁earlier ▁purchase ▁of ▁the ▁W & ER ▁( which ▁had ▁long ▁intended ▁an ▁extension ▁of ▁the ▁E H & LR ▁Ed g ware ▁route ▁towards ▁Wat ford ). ▁This ▁also ▁provided ▁the ▁potential ▁for ▁further ▁extension ▁in ▁the ▁future ; ▁Bus he y ' s ▁town ▁pl ann ers ▁reserved ▁space ▁in ▁Bus he y ▁village ▁for ▁a ▁future ▁station ▁and ▁Bus he y ▁He ath ▁station ' s ▁design ▁was ▁re vised ▁several ▁times ▁to ▁ensure ▁this ▁option ▁would ▁remain ▁available ▁in ▁the ▁future . ▁ ▁The ▁project ▁involved ▁elect r ification ▁of ▁the ▁surface ▁lines ▁( oper ated ▁by ▁steam ▁trains ▁at ▁the ▁time ), ▁the ▁dou bling ▁of ▁the ▁original ▁single - line ▁section ▁between ▁Fin ch ley ▁Central ▁and ▁the ▁proposed ▁j unction ▁with ▁the ▁Ed g ware ▁branch ▁of ▁the ▁Northern ▁line , ▁and ▁the ▁construction ▁of ▁three ▁new ▁linking ▁sections ▁of ▁track : ▁a ▁connection ▁between ▁Northern ▁City ▁Line ▁and ▁F ins bury ▁Park ▁station ▁on ▁the ▁surface ; ▁an ▁extension ▁from ▁Arch way ▁to ▁the ▁L NER