On Thu, 09 Oct 2003 08:23:08 GMT, Mark Etherington wrote:
I'm also looking at this problem, as I live in Lewisham. I'm on my first
Oyster monthly at the moment. If I buy my next monthly well in advance,
will it load onto my card at my selected station (probably London Bridge)
before my old season expires,

Yes, you get a flashing green light at the barrier to show the new
ticket has loaded.

David