▁R ams gate ▁Olymp ia , ▁had ▁become ▁extremely ▁popular , ▁and ▁began ▁to ▁lo bb y ▁the ▁Southern ▁Railway ▁to ▁re open ▁the ▁line ▁through ▁the ▁tunnel , ▁with ▁a ▁new ▁j unction ▁station ▁between ▁Dum pton ▁Park ▁and ▁Broad st airs . ▁The ▁Southern ▁Railway ▁rejected ▁the ▁proposal ▁as ▁too ▁cost ly ▁and ▁imp ract ical . ▁R ams gate ▁Olymp ia ▁and ▁the ▁Southern ▁Railway ▁were ▁keen ▁to ▁make ▁the ▁attra ctions ▁near ▁the ▁har bour ▁accessible ▁from ▁the ▁railway ▁main ▁line , ▁and ▁to ▁provide ▁a ▁service ▁from ▁the ▁sea front ▁to ▁the ▁grey h ound ▁stad ium ▁at ▁Dum pton ▁Park . ▁The ▁two ▁companies ▁eventually ▁agreed ▁on ▁a ▁scheme ▁under ▁which ▁a ▁new ▁narrow - g au ge ▁line , ▁dub bed ▁the ▁T unnel ▁Railway , ▁would ▁use ▁the ▁ ▁of ▁the ▁tunnel ▁nearest ▁the ▁beach , ▁before ▁branch ing ▁off ▁into ▁a ▁new ▁ ▁tunnel , ▁which ▁would ▁emer ge ▁at ▁a ▁new ▁station ▁at ▁Her es on ▁Road , ▁a ▁ ▁walk ▁from ▁Dum pton ▁Park ▁station . ▁To ▁increase ▁passenger ▁numbers ▁and ▁encou rage ▁people ▁to ▁use ▁the ▁new ▁rail ▁line , ▁R ams gate ▁Olymp ia ▁planned ▁the ▁construction ▁of ▁a ▁large - scale ▁housing ▁estate , ▁char ab anc ▁par king ▁facilities , ▁and ▁a ▁ 1 0 , 0 0 0 - se at ▁stad ium ▁at ▁Dum pton ▁Park . ▁The ▁railway ▁closed ▁in ▁ 1 9 6 5 . ▁ ▁When ▁Dum pton ▁Park ▁Station ▁was ▁first ▁built