I have the same problem at the moment. Two weeks ago checker gave date of 31/03/11 for fibre (only waiting since last August)
A week and a half ago I check the checker and nothing no mention of fibre. I checked a few other numbers in my area and they have all gone. I waited a few days and still the same so I contacted a contact in the NGB dept in Northern Ireland here and he informed me the database was being refreshed yesterday and see if it comes back on over the weekend. Unfortunately not, so I have dropped him another email to see how long this problem is going to be as I want off this 1mb line and onto something faster with ADSL24

Yeah. It's not easy going back to BT.Not only having problems with broadband database but my network services still aren't working after 10 days. Did not even reply to my complaints email. The accounts dept. are pretty efficient though, got my first bill already.

Clearly, I'm 'shutting the stable after the horse has bolted', but...
why didn't you just get a MAC code from Sky, then tried to order Infinity using this ? See plenty of these type conversions going on round here..

I would guess the OP was on full LLU (ie phone and broadband). In that case MAC codes aren't relevant and BT would have no access to the line data as it is controlled by Sky.

You are correct ian 72. Sky do supply a MAC code when leaving a full LLU package.Your chosen new phone supplier takes over your line and you then order broadband from an ISP as a new customer.

if Sky are supplying a MAC when leaving a full LLU service then I am surprised, as with full LLU there is or at least there never used to be any provision for providing a MAC.

What might be happening is that when people express an interest in leaving Sky they move them back to WLR and SMPF broadband, then issue the MAC.

OR

Even though people were with line rental and broadband from Sky, it was not really FULL LLU (MPF).

Correction to my last post. Should have read Sky do not supply a MAC code .

Best to edit that earlier post then, making the edit clear .

However, if the route followed is to get the line returned to WLR, then you would need to get a MAC from them later in order to migrate away, as MrSaffron says.

Not needing a MAC would only apply if you moved both line and broadband to the same CP.

Edit time had expired before I noticed the error.
My contract with Sky full LLU ended as confirmed by them in writing on 18/3. I now have a BT line with no broadband so if I order broadband from an ISP other than BT where do I stand regarding a MAC code?

You shouldn't need a MAC if the line has been migrated back to BT. You should just place an order for broadband with your preferred supplier.