I would imagine that it's just because BT (or the other British carriers) aren't sending the calling-number data into the Irish trunks (which quite possibly means they're not sending it on any international calls).
I never get international calls shown up with a number on my caller ID. The system just sends the "international" code, not even any indication as to country of origin.
By the way, while we're talking about caller ID, the U.K. also uses 141 as a prefix to block ID on a single outgoing call. If ID is disabled as your default setting, then you can release it for a single call with the prefix 1470.
[This message has been edited by pauluk (edited 02-12-2003).]
