Been mapping the BT cabinets around Southampton, or at least the part where I live. Can't hurt to make this available to other people, so here's a URL you can paste into Google Maps
Markers are numbered with the cabinet number if I was able to discover it
Red markers mean that cabinet shows no sign of getting FTTC
Green markers mean there's definitely FTTC from that cabinet according to Openreach
Blue means it looks like it has or will get FTTC
Yellow means for whatever reason I wasn't sure or couldn't check
Yes I've focused on cabinets for HAMPTON exchange because that's nearest to me, if you live over in Shirley or by the docks this isn't much use (yet?), feel free to go build your own map!