Mizter T wrote:

The situation on the DC lines (Euston - Watford) at Kilburn High Street
and South Hampstead will be resolved when TfL take over from Silverlink
in November, which just leaves the 'one' lines from Liverpool Street up
to / Seven Sisters/ Tottenham Hale/ Walthamstow Central to be sorted
out. C2C accepting Oyster PAYG at Rainham and Degenham Dock is just a
logical development in that they are of course the only two stations
C2C has in the zones that don't currently accept PAYG.

Don't some of the late night services stop at Maryland & Forest Gate?
There's been a lot of advertising in leaflets (and rather less at stations
managed by "one") that PAYG is not valid there.