On 30 May 2007 16:19:52 -0700, XmaX wrote:

Also, regarding to time limit, I found this:
"The two-hour Maximum Journey Time (MJT) was determined when Pay As
You Go (PAYG) was launched on the basis that Journey Planner didn't
quote any journey on the Tube and DLR taking longer than this." -
http://www.ealingtimes.co.uk/oyster/weekone/

Although (IIRC) it reckons Epping to Chesham takes 1hr57, and that's
assuming no delays and only having to wait 4 minutes for the
half-hourly Chesham shuttle. (Also, I think it's measured from the
moment the train leaves Epping, rather than the moment you touch in.)