<P> The first zones were introduced on 4 October 1981 . The whole of Greater London was divided into bus zones where flat fares applied . On the London Underground the area that is now zone 1 was divided into two overlapping areas called City and West End . On 21 March 1982 fares to all other London Underground stations were graduated at three mile intervals--effectively creating zones--although they were not named as such until 1983 when the Travelcard product was launched covering five numbered zones . City and West End became zone 1 and the rest of Greater London was within zones 2, 3, 4 and 5 . Further products were launched using the zones: One Day Travelcard (1984), Capitalcard (1985), One Day Capitalcard (1986). In January 1991 Zone 5 was split to create a new Zone 6 . </P> <P> All of Greater London is within the six principal fare zones numbered 1 to 6 . Inner zone 1 forms a roughly circular area and covers central London . Each of five outer zones forms a concentric ring around it . Zones 4, 5 and 6 additionally extend into parts of Essex, Hertfordshire and Surrey . List of boroughs in each zone: </P> <Table> <Tr> <Th> Zone </Th> <Th> Inner London </Th> <Th> Outer London </Th> <Th> Outside London </Th> </Tr> <Tr> <Td> </Td> <Td> Central London: City of London, Camden, Hackney, Islington, Kensington & Chelsea, Lambeth, Southwark, Tower Hamlets and Westminster </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> Camden, Greenwich, Hackney, Hammersmith & Fulham, Islington, Kensington & Chelsea, Lambeth, Lewisham, Southwark, Tower Hamlets, Wandsworth and Westminster </Td> <Td> Brent, Ealing, Hounslow, Newham </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> Camden, Greenwich, Hackney, Islington, Lambeth, Lewisham, Southwark, Wandsworth </Td> <Td> Barnet, Brent, Croydon, Ealing, Haringey, Hounslow, Merton, Newham, Richmond upon Thames, Waltham Forest </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> Greenwich, Lewisham </Td> <Td> Barking and Dagenham, Barnet, Bexley, Brent, Bromley, Croydon Ealing, Enfield, Haringey, Hounslow, Merton, Newham, Redbridge, Richmond upon Thames, Sutton, Waltham Forest, Kingston upon Thames </Td> <Td> Epping Forest (Essex) </Td> </Tr> <Tr> <Td> 5 </Td> <Td> </Td> <Td> Barking and Dagenham, Barnet, Bexley, Bromley, Croydon, Ealing, Enfield, Harrow, Hillingdon, Kingston upon Thames, Richmond upon Thames, Sutton, Waltham Forest </Td> <Td> Epping Forest (Essex), Epsom and Ewell (Surrey) </Td> </Tr> <Tr> <Td> 6 </Td> <Td> </Td> <Td> Bexley, Bromley, Croydon, Enfield, Harrow, Havering, Hillingdon, Hounslow, Kingston upon Thames, Richmond upon Thames, </Td> <Td> Elmbridge (Surrey), Epping Forest (Essex), Epsom and Ewell (Surrey), Hertsmere (Hertfordshire), Reigate and Banstead (Surrey), Tandridge (Surrey), Three Rivers (Hertfordshire) </Td> </Tr> </Table> <Tr> <Th> Zone </Th> <Th> Inner London </Th> <Th> Outer London </Th> <Th> Outside London </Th> </Tr>

Where is zone 1 to 4 in london
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