High Quality Content by WIKIPEDIA articles! Aldgate tube station is a London Underground station located at Aldgate in the City of London. The station is on the Circle Line between Tower Hill and Liverpool Street. It is also the eastern terminus of the Metropolitan Line. It is in Travelcard Zone 1, and its ticket office is part-time only. Platforms 1 and 4 at Aldgate are two of the only three platforms on the network to be served exclusively by the Circle Line (the other being Platform 2 at Gloucester Road- which even can be used by District trains if necessary- i.e. during engineering work or disruption). All other Circle Line platforms are shared by the District, Metropolitan and/or Hammersmith & City Lines.