On Tue, 15 Dec 2009 22:11:04 -0000, Paul Scott wrote:

Just to add fuel to the flames, Southern have provided some clear and
unambiguous guidance (!) on this page:

http://www.southernrailway.com/ticke...s/oyster-card/

"If you already have a Travelcard but want to use your Oyster card
outside the zones covered by the Travelcard you might need to get an
Oyster Extension Permit before you travel.

'Might' is correct in that context really,

Not very useful advice though...

...If you travel with an
Oyster extension Permit you might be liable to a Penalty fare or even
prosecution."

Shocking error that bit...

But by the same logic, it's correct. For example, you could have an
OEP but travel out of the Travelcard zones.