▁passenger ▁numbers . ▁A ▁secondary ▁purpose ▁was ▁to ▁provide ▁a ▁location ▁suitable ▁for ▁a ▁large ▁new ▁dep ot ▁that ▁was ▁required ▁to ▁accommod ate ▁and ▁maintain ▁the ▁new ▁fleet ▁of ▁ 1 9 3 8 ▁Stock ▁trains ▁to ▁be ▁used ▁across ▁the ▁existing ▁Northern ▁line ▁and ▁the ▁lines ▁taken ▁over ▁from ▁the ▁L NER . ▁The ▁dep ot ▁was ▁to ▁be ▁constructed ▁to ▁the ▁south ▁of ▁the ▁running ▁tracks ▁between ▁Bus he y ▁He ath ▁and ▁El st ree ▁South ▁with ▁access ▁from ▁each ▁end . ▁ ▁Bus he y ▁He ath ▁station ▁was ▁to ▁be ▁located ▁on ▁the ▁east ▁side ▁of ▁the ▁round about ▁j unction ▁of ▁Wat ford ▁By - pass ▁( A 4 1 ) ▁and ▁El st ree ▁Road ▁( A 4 1 1 ). ▁The ▁station ▁would ▁have ▁had ▁three ▁tracks ▁with ▁two ▁double - s ided ▁platforms . ▁The ▁arrangement ▁placed ▁the ▁station ▁entrance ▁directly ▁next ▁to ▁the ▁round about ▁prevent ing ▁any ▁later ▁extension . ▁The ▁station ▁was ▁to ▁be ▁provided ▁with ▁a ▁large ▁bus ▁station ▁and ▁car ▁park . ▁The ▁L PT B ▁planned ▁to ▁purchase ▁the ▁land ▁on ▁all ▁four ▁sides ▁of ▁the ▁j unction ▁and ▁proposed ▁an ▁extensive ▁commercial ▁development ▁around ▁the ▁round about ▁including ▁a ▁cinema , ▁road house ▁and ▁around ▁ 4 0 ▁sh ops . ▁As ▁with ▁El st ree ▁South , ▁the ▁architect ▁appointed ▁to ▁design ▁the ▁station ▁was ▁Charles ▁Hold en . ▁ ▁Const ruction ▁work ▁on ▁the ▁Northern ▁He ights ▁project ▁began ▁in ▁the ▁late ▁ 1