On 13 Dec, 13:00, Paul Corfield wrote:

On Sun, 13 Dec 2009 08:57:28 -0000, "Ian F."

[1] I have no idea whether "NR lines" are differentiated for OEP
purposes in the same way that they will be differentiated in terms of
charging rates. Lines currently valid for PAYG stay on the TfL tariff
next year but the lines being added to the system (primarily but not
entirely south of the river) are on the NR tariff.
--
Paul C

The rule will be:
If you are travelling outside the zones of your Travelcard(s) on a
National Rail train, you must load an OEP and touch in before boarding
that train

Two examples:

1)

Z1-2 Travelcard on Oyster card
Liverpool Street NR to Stratford
OEP set before entry
Mixed Travel Entry charge deducted on entry
balance adjusted on exit according to the NR only Z3 NR extension fare
(which will be the same as the Z3 NR pay as you go charge)
NB this will technically be the TfL Z3 fare (because the route
currently accepts payg) but will be capped at the NR fare
OEP removed by exit touch

2)

Z2-6 Travelcard on Oyster card
Elephant and Castle NR to Kentish Town
OEP set before entry
Mixed Travel Entry charge deducted on entry
balance adjusted on exit to reflect Z1 NR only extension fare (which
will be the same as the Z1 NR only Oyster pay as you go fare)
OEP removed by exit touch