The Southeastern website confirms that Oyster will be accepted at Dartford from Sunday September 6th. It doesn’t list any fares, and customer services can’t confirm them either, but a little digging through the new fares database reveals that these are likely to be the adult fares:
|Dartford to Zone||Peak fare||Off-peak fare|
|1 (NR only)||£7.00||£4.00|
|1 (NR + TfL)||£9.30||£6.30|
The add-on for using the tube in zone 1 looks too high. I’ll try and confirm fares after the bank holiday.
Update: September 1st: Fares information is still being sought, but I can confirm that Oyster readers have been added to half the gates and the ticket machines at Dartford. The yellow pads confirm that Oyster PAYG will be accepted from Sunday 6th September.