I know that my exchange (TA10 9HY) has FtC (I have Fibre on another provider's line that I am about to cancel) and shows that TalkTalk has slots at this exchange.
When I ask TT to sell me Fast Fibre I am told that 'Due to local demand TT cannot offer me Fibre,! !
Can TalkTalk please ask OpenReach to free up a slot that I know exists at the local exchange?