I have an Oyster card that is auto-topped up if it falls below £20.
Currently I only use it on the buses, but I wonder if it's yet
possible to do the following with this card:-

1] Travel from East Croydon to St. Pancras by Thameslink train.

2] Travel from E. Croydon to Victoria by tain, then from Victoria tube
station to Kings Cross tube.

I did one of those trips (can't remember which) in Feb 2007, and my
Oyster card let me IN but wouldn't let me OUT - so I had to pay a
penalty. I'd innocently thought it would be possible, and wonder if it
is now?

Adam.