I have stopped using my VDSL line as there are numerous problems which can not be resolved. I've asked for it to be replaced, but the copper is not bad. So I asked them to make the speed better since I'm receiving poor speed (27/10 instead of 80/20). They said that they can't. It's just one massive loop. So I swapped to 5g broadband until Full Fibre is being installed (even though there's no plans) and I would like to have my entire line removed. Internal and External (including the line from the cabinet to my house, and the internal wiring (extensions and master socket)). Would this be something that Openreach can do?
I doubt Openreach will remove the outside line without sending a large bill to you. As regards the internal wiring, everything after the Master socket is yours to do with as you wish.