South Woodford tube station is closer to central London than other stations that are already in zone 3.  

There is ample precedent for stations being re-zoned when a persuasive social and economic case is made.  In 2007, Roding Valley, Chigwell, Grange Hill, Hainault and Barkingside Central Line tube stations were all moved into zone 4 from zone 5.  In 2014 Stratford and Stratford High Street and Stratford International stations were all moved from zone 3 to zone 2/3. These are just a few of many examples of London stations being re-zoned.  

There will be a net financial benefit from re-zoning South Woodford tube station in zone 3.

The re-zoning of South Woodford tube station in zone 3 will result in much-needed savings for people travelling into central London, but with no increase in fares for people travelling into South Woodford from further west.