Robin Mayes wrote:

"Mizter T" wrote in message
oups.com...

Now for the obvious question - do you have a list of those four
stations? Presumably if a person starts their journey (and touches in)
or ends their journey (and touches out) at one of these four trial
stations but has failed to touch-in/out at the other end then the £4
charge applies.

I saw the poster at Surrey Quays on the East London Line the other day.

According to Paul C in another part of this thread:

Aldgate, West Ham, New Cross, Stepney Green, Upney are the LUL trial
stations.

Westferry and Tower Gateway are the DLR trial stations.

Thanks for your reply - unfortunately I saw Paul C's post with the
required info just after I asked you! Such is life on usenet.

I presume that when you touch-in at these stations using PAYG £4 is
debited, which is adjusted when you later touch-out so only the correct
fare is taken.

Likewise if you touch-out at one of these stations having failed to
touch-in elsewhere then I presume £4 is taken there and then.

Going from what Paul has said elsewhere it doesn't sound like either of
these things happen if a Travelcard (with correct zonal validity) is
loaded on the Oyster. However this does thus leave open a hole in the
system where a passenger with Travelcard can enter/exit the system at a
gated station within their Travelcard's zonal validity but can then
leave the system at an ungated station where they will suffer no
penalty if they fail to touch-out.