Yes, the ducting was originally (since 1992) used for copper. However I've no idea where to look for the 'agreement' you mention - would it be in my neighbour's/my deeds or legal stuff ?
Would doubt you would have anything recorded on your title deeds, especially for what is an extremely minor telecoms wayleave.
I have way-leaves for UKPN high voltage OH power and Anglian Water mains water (that crosses hundreds of metres of my property on the way into neighbouring village in Suffolk). Neither of which are on my deeds proper. That would be an easement. I receive a pecuniary annuity for the HV power wayleave (as it doesn’t serve my property).
Both of those wayleaves are historic, the power way-leave is more than forty years old and the water is from the eighties. Any wayleave paperwork should be kept with the wayleaves office/dept with the relevant utility. Whomever agreed any wayleave would have a copy, but these can get lost with time especially as ownership changes.
Back to your neighbours issue. As I said in my post above, your neighbours problem looks like a “perceived” issue to me (which I think any sensible bod at OR will hopefully see as actually a non-issue, seeing as copper was already in place for thirty odd years, and will undoubtably JFDI perhaps with sufficient prod from the neighbours CP). Any excuse for the subbies to chuck it back on the too hard pile is my take.
Edited by Pheasant (Tue 29-Jun-21 14:04:40)