I hadn't checked for ages on availability for mine but you prompted me to. Mercifully, I have Virgin fibre for my broadband as BT's offering has always been dire where I live. So, let's see what is on offer today shall we:
512k Lowest assured download speed
Oh, and I also get the 5 months blah blah for fibre message too. I'm a little South of you, on the Wirral, if anything changes in the next 5 months I'll be suitably astonished.