Just noticed the following:-
Oftel's January 2003 ADSL Factsheet
Broadband Registration Scheme: "BT has decided to remove the 42 day confirmation process from its registration scheme. Once trigger levels are met and confirmed by BT, work will begin to upgrade the exchange"
If I understand this correctly, it hopefully means that my earlier comment about converting 75% interest in to firm orders no longer applies. Good news for those whose local exchanges are at, or approaching, their trigger levels.