On Sun, Dec 02, 2012 at 07:31:12PM +0000, Paul Corfield wrote:

There is decent enough information around as to where Oyster does or
does not work. IMLE many TOCs go to reasonable lengths to display
posters at stations and on trains and to use in train displays to say
clearly where Oyster stops being valid. I'm pretty sure Greater
Anglia, London Midland, C2C and Southern use these means. I rarely use
South Eastern but am well aware of the Dartford difference.

Southern *used to*, but then they started accepting PAYG and I've not
noticed any publicity at all about where it is and is not valid. I'd
not be at all surprised to find that people get caught out trying to use
it to get to places like Gatwick or Redhill or Woldingham.

--
David Cantrell | Nth greatest programmer in the world

Irregular English:
you have anecdotes; they have data; I have proof