On 13 Dec, 15:58, "Tim Roll-Pickering"
wrote:

Mizter T wrote:
By security I take it you mean fare checking (or 'revenue inspection'
- but I dislike that phrase because I think it's very narrow) - not
quite the same thing in my mind but of course they overlap.
Interesting thought - I hadn't considered the difference six car
trains (or three car - depending on how you look at it!) might make to
checking tickets. Most DLR stations simply ain't set up to accomodate
tickets gates, so I dare say that if there is deemed to be an issue
then teams of roving inspectors would fit the bill - I don't think
I've ever come across such a thing on a DLR train actually, though I
have seen ticket checking teams at stations a few times.

I have a few times on the Stratford branch. Perhaps that's also because
Stratford is a nightmare for knowing how to use Oyster correctly when
interchanging (especially from tickets).

IME there isn't really an issue here - at least there isn't a
technical issue, the issue is with regards to people getting
unneccesarily worried about it which is understandable as there isn't
any guidance.

Touching on Oyster interchange validators at Stratford or similar
locations isn't necessary if one is using PAYG from point A (e.g.
Pudding Mill Lane on the DLR) to point B (e.g. Leyton on the Central
line) as one touches-in and out at the start/end of that journey.
However if one does touch on an interchange validator it doesn't
matter - all that happens is that the journey would then be extended
from Stratford to Leyton when one touched-out at the latter.

In other words one does not have to use the interchange validators
whatsoever if one is merely interchanging there as part of an overall
PAYG journey, but nothing bad happens if one does.

(It's worth noting that these interchange validators - i.e. within
gated stations - are set up differently from those in use elsewhere at
ungated stations on the DLR and indeed at a number of LU, LO and
National Rail stations - the latter are set up as entry & exit
validators, and once you've touched on these the system will regard
your journey as either having started or finished.)

Many (inc. Paul C) have said that better information should be
provided - I suspect the basic problem with providing this information
is that it might assist people in working out the potential loopholes
that are inherent with interchange validators, something I've hinted
at in the past though I note one contributor to this ng recently laid
it out in a straightforward manner. In other words spelling out
exactly how they work will assist people to abuse the system.