On Nov 10, 3:48 pm, asdf wrote:


Are you saying that PAYG is not valid on Southern between these
stations? Where is the National Rail information that says this?


See foot of page at: http://www.nationalrail.co.uk/times_...oysterservices

Oyster PAYG is not valid from Watford Junction, full stop, according
to this. Where does it say different?

London Midland will presumably set the fares from Watford Junction to
Euston, seeing as how they operate most of the through services that
customers will actually use for the journey, and they (through their
predecessors) will only have signed up to accepting Oyster when the
rest of the London area accepts it in 2009.