Both existing passenger subways will be extended north to connect with the ticket hall , and the abandoned subway at the eastern end of the station , which formed part of the old station complex , will be reopened and refurbished to allow interchange between platforms 3 through to new high-level 1 & 2 . Both existing passenger subways have been extended north to connect with the ticket hall , and the abandoned subway at the eastern end of the station , which formed part of the old station complex , has been reopened and refurbished to allow interchange between platforms 3-12 and the new high-level platforms 1 & 2 .