"Commuter" wrote in message
...
Just seen on another forum that members are arranging a Zone 1 (except
Blackfriars) 'Tube challenge' where they aim to visit all stations in
the shortest possible time for a competition between members (not a
world record attempt or anything).

It has been raised that there may be problems with Oyster PAYG and
that users should instead buy a z1-2 Travelcard. What would happen if
someone touched in and didn't touch out again for say 3 hours, even
then they may touch out at a different location? Would there be the £4
minimum charge or would something else happen?

You would be charged two £4 fares. The system would consider the touch
in and touch out to be two separate journeys as they are more than 2.5
hours apart.

Peter Smyth