Travelcard Zone 1
Travelcard Zone 1 is the central zone of Transport for London's zonal system used for calculating co-ordinated inter-modal Travelcard fares within London. London is split into six (approximately concentric) zones for the purpose of determining the cost of London transport fares on the London Underground and Docklands Light Railway, but not journeys undertaken entirely by bus or tram, for which a city-wide flat fare applies.