The original alignment was quadrupled "in stages between 1860 and 1892" for freight services before the extra (western) tracks were lifted as traffic declined during the 20th century, and were re-laid for Jubilee line services that started in 1999.
Den oprindelige linjeføring blev firedoblet "i etaper mellem 1860 og 1892" til godstog før de ekstra (vestlige) spor blev løftet da trafikken faldt i løbet af det 20. århundrede, og blev genlagt for Jubilee line-tog, der begyndte i 1999.