These days BT do a "self-install", where they give you a HomeHub 5 and a dangly filter, just as with ADSLx. You no longer normally get an engineer visit.
This is far from the best way of doing things on FTTC. Given a modern NTE5 then you can get a VDSL faceplate for it from many places, but technically you are not allowed to replace the NTE yourself.
If you get an engineer visit for anything they are supposed to replace the master with a modern one, free. I wouldn't wish it upon yourself if I were you.
What are the FTTC estimates for your line from this checker
The indispensable man or woman passes from the scene, and what happens next is more or less the same thing as was happening before.
My broadband basic info/help site - www.robertos.me.uk.
Domains, site and mail hosting - Tsohost
Connection - AAISP Home::1 80/20. Sync 59504/15641kbps @ 600m. - BQM