No, the installation wasn't done on the 29th!
There are rumours in the village that the BT Wholesale Checker was premature when it reported the CABs ready. That's a very plausible theory. I mentioned it when talking to BT Support - they would neither confirm nor deny.
If it really is the case, why don't BT say so? I would me much happier with a known situation rather than the nebulous "something is preventing the installation".
The initial date for the CABs was 31/12/10. This changed to 31/03/11 and then to 15/02/11. Perhaps the 31st March date will be reinstated but I'm not hopeful.
Xilo C&W LLU, Netgear DG834 PN, St Ives Cambs