Following the EE route, and so far so good, although they still want to lop more stuff off tree than I have already done. But, the key thing, they are not going to charge me for this, so I will let them get on with it.
Spoke to these guys. Very helpful, but as there is already fiber in the lane, they said it would be better to just go with a "normal broadband provider" (their actual words 🙂 )