On 12 Apr 2006 02:57:08 -0700, "John B" wrote:

If you have an unresolved PAYG journey from anywhere else, TfL reserve
the right to charge you the maximum fare, but in practice they charge
you the minimum - ie the fare from the zone you touched in to another
station in that zone. The only incentive to avoid unresolved PAYG
journeys on LUL is that they do not count towards daily capping.

I was once told by a ticket clerk that the Oyster would stop working
if you had too many unresolved journeys on it...