BT are to scrap the preregistration scheme & replace it with a pre-ordering system.
Link to BT's Press Release
Also note: as from 27/4/2004, the registration scheme is
closed.
Exchanges that have not triggered or are not within 10% of their trigger target will have an RFS date set & anounced at the end of June.
The BT availability
checker has already been updated to inform people of the removal of the preregistration scheme.