On Thu, 19 Jan 2012 13:53:57 +0000
Roland Perry wrote:
The Oyster system seems supersensitive to multiple cards being presented
- it didn't work if in the same wallet as a door-entry "card" (actually
more of a thick card-sized token).

I've had the occasionally issue with a company security pass but not often.
It probably depends on what radio frequency the other card uses. If its the
same one as oyster then I suspect there'll be problems.

B2003