"Paul Scott" wrote
"John Salmon" wrote
Anyone know any more, are any other stations moving - I'd guess the
whole Hainault loop is going into zone 4?

Yes. See:
http://www.tfl.gov.uk/tfl/pdfdocs/lon_con_2007.pdf

How did you find that? Odd that it has the filename of the London
Connections map, not the tube map...

I cheated - I put "Chigwell zone 4 2007" in a Google search.