but this website (http://www.dslchecker.bt.com/adsl/ADSLChecker.postcodeoutput) appears to indicate that Fibre Multicast(?) will be available from June 30th.
The BTW checker website is generally regarded to give the best indication of plans. However, use of the "postcode checker" on that site is best avoided.
It is better to use the variant that uses your telephone number, if you have one through BTW.
However, it is also good to use the full address checker variant, but only entering the postcode. The website will return a list of addresses, allowing you to see results for individual properties.