In reply to a post by Moradin:

no, im not on a BT line. thats using the postcode.

but none of the post codes, or any postcodes within 2 miles are FTTC enabled.

That seems to be a common problem. The "postcode checker" just doesn't seem to give results that are meaningful date-wise. The speed estimates seem to be a valid summary of the postcode, but the date information just gets ignored.