On 13 Dec, 15:02, JD wrote:

Z2-6 Travelcard onOystercard
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 onlyOysterpay as you go fare)
OEP removed by exit touch

I got this wrong. As has been pointed out - this is a route that
currently accepts payg

If the entry touch is between 06:30 and 09:30 or 16:00 to 19:00 (M-F)
the fare will be £1.80 (TfL fare is cheaper than NR fare of £1.90)

All other times - will be charged the Off-Peak NR fare - £1.50