On Mon, 23 Oct 2006 17:43:55 +0100, Paul Corfield wrote:

In all cases, does Oyster acknowledge that you are merely interchanging
or should you always avoid journeys with intermediate barriers? How
long would you be given to make these changes?

In short, in all of the examples you quote you always remain on the LU
fare scale (due to DLR and NR / LU joint availability) so the
interchange gates will treat you on this basis. Money will be taken off
and added back on so that at final exit you will pay the fare from your
origin to your final destination.

There is a time limit for the interchange trips but I don't know what it
is these days.

A year or two ago I managed 25 minutes between Baker Street and
Marylebone (walking between the stations and then waiting for my train
- you can't really go through the barriers at Marylebone until your
train is announced).

It would be sensible for it to vary according to location - at King's
Cross (as was) you would only have needed a few minutes, but at
Marylebone (in the Tube-to-NR direction) you might need much longer,
especially on Sundays when there's only 1tph. And if your train was
cancelled (or you missed it) and you decided to take the Tube instead,
would it charge you again when you re-entered the Tube?