On Sun, 17 Sep 2006 11:39:20 +0100, James Farrar
wrote:

Heard at London Bridge Jubilee line westbound platform late on Friday
night, an obviously pre-recorded announcement informing us that
"Oyster Pay-As-You-Go is not valid on any National Rail services from
this station".

I despair.

And at Liverpool Street (LUL) there are fairly frequent reminders that
Oyster Pay-as-you-go is valid only between Liverpool Street and
Stratford. No mention of Seven Sisters or tottenham Hale.