LONDON ZONAL FARES ON NATIONAL RAIL

I found out about this after someone called to take a survey about the issue.
The change takes effect on 2 Jan  and will likely increase your costs into central London.
I'm in zone  6 now , so the increase for me will be 70p for a cheap day return, which I wouldn't mind if I could also use my Oyster card instead of  needing to buy a seperate ticket.

Find out more at these  websites:

http://www.gnn.gov.uk/environment/fullDetail.asp?ReleaseID=235656&NewsAreaID=2&NavigatedFromDepartment=False

http://nationalrail.co.uk/times_fares/LondonZonalFares.html