They finally added an online availability checker.
https://cloud.consumer.talktalk.co.uk/fttp-form
It says it's (still) not available to me.
I called up to query just in case. The guy on the phone tells me if it isn't available my property must still be within BT's 5 year exclusivity period and i need to wait for Talktalk to get a license to sell it in my area.
I do wonder if they are actually trained with answers like that or if they just make it up.
I politely corrected him.